1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
|
<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Loader Class — CodeIgniter 3.1.10 documentation</title>
<link rel="shortcut icon" href="../_static/ci-icon.ico"/>
<link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
<link rel="index" title="Index"
href="../genindex.html"/>
<link rel="search" title="Search" href="../search.html"/>
<link rel="top" title="CodeIgniter 3.1.10 documentation" href="../index.html"/>
<link rel="up" title="Libraries" href="index.html"/>
<link rel="next" title="Migrations Class" href="migration.html"/>
<link rel="prev" title="Language Class" href="language.html"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
</head>
<body class="wy-body-for-nav" role="document">
<div id="nav">
<div id="nav_inner">
<div id="pulldown-menu" class="ciNav">
<ul>
<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
</ul>
</li>
</ul>
<ul class="current">
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="benchmark.html">Benchmarking Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li>
<li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="cart.html">Shopping Cart Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="config.html">Config Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="email.html">Email Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="encrypt.html">Encrypt Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="encryption.html">Encryption Library</a></li>
<li class="toctree-l2"><a class="reference internal" href="file_uploading.html">File Uploading Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="form_validation.html">Form Validation</a></li>
<li class="toctree-l2"><a class="reference internal" href="ftp.html">FTP Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="image_lib.html">Image Manipulation Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="input.html">Input Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="javascript.html">Javascript Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="language.html">Language Class</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">Loader Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="migration.html">Migrations Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="output.html">Output Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="pagination.html">Pagination Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="parser.html">Template Parser Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="security.html">Security Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="sessions.html">Session Library</a></li>
<li class="toctree-l2"><a class="reference internal" href="table.html">HTML Table Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="trackback.html">Trackback Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="typography.html">Typography Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="unit_testing.html">Unit Testing Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="uri.html">URI Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="user_agent.html">User Agent Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
<li class="toctree-l2"><a class="reference internal" href="zip.html">Zip Encoding Class</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<div id="nav2">
<a href="#" id="openToc">
<img src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAgAAZABkAAD/7AARRHVja3kAAQAEAAAARgAA/+4ADkFkb2JlAGTAAAAAAf/bAIQABAMDAwMDBAMDBAYEAwQGBwUEBAUHCAYGBwYGCAoICQkJCQgKCgwMDAwMCgwMDQ0MDBERERERFBQUFBQUFBQUFAEEBQUIBwgPCgoPFA4ODhQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQU/8AAEQgAKwCaAwERAAIRAQMRAf/EAHsAAQAABwEBAAAAAAAAAAAAAAABAwQFBgcIAgkBAQAAAAAAAAAAAAAAAAAAAAAQAAEDAwICBwYEAgsAAAAAAAIBAwQAEQUSBiEHkROTVNQWGDFBUVIUCHEiMtOUFWGBobHRQlMkZIRVEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwDSC+ygkOOaUoKigUCgUCgUCgUCgUCgUCgUCgkuGguIP9FBMFb0Hqg7We+3jlmIqqYFf4ub+/QYlnOR/LqIBKGFUbf8qWv971BytQXXE7Y3Lnm3HsFhp2TaZJAdchRXpIgSpdEJWxJEW3xoKV7F5OMy7JkQn2o7D6w33XGjEAkoiqrJEqIiOIiKuhePCgqp22dyYyS3CyWHnQ5joG61HkRnmnTbaFSMhExRVQRRVJU9iUHjE7ez+fJ0MFipmUNhBV8YUd2SoIV9KkjQla9ltegttBdPLW4/qocL+UTfrMiHW4+P9M71shuyrqaHTcxsl7jegpsji8nh5ZwMvDfgTm0RTjSmjYdFCS6KoOIipdFunCgmNYTMv457MMY6U7iI6oMieDDhRm1VbIhuoOkbqtuK0Hpzb+eZcYZexUxt6UyUqK2cd0SdjtgrhOgijcgERUlJOCIl6CpgbP3blRI8XgMjNARAyKNDfeRBdFDBVUAXgQrqH4pxoJTu2NysY97LP4ac1io5q1InHFeGO24LnVKJuKOkSQ/yKir+rh7aCLG1dzypZQI2FnvTgccYOM3FeN0XWERXAUEFVQgQkUktdLpegm+Td3/Xli/L+S/mYNJIOF9G/wBeLKrZHFb0akG6W1WtQWSg3Dyg5e7V3fipE3O4/wCrktyzYA+ufas2LbZIlmnAT2kvuoN1wft95augilglX/tzP3qCu9O3LL/wV/i5v79BvmTADq14UGu91467Z6U9y0HzH/ncj/U/sT/CgynZG7I2NezpZGUjIycJkYkZSG+uQ81pbBNKLxJfjwoMqZ3/ALYHl35AJ7/cuwHcu5k7r1Q5pHetBjquqVVJWGxj9Zrtcl/Ggy3dHMvauR3HFZj5nHNxSyW5JISYDMoIwx8tFIGHZhPNaykGapr6rUAiicEoMG21lMRj8buPAz8xhJrr7uOeiPTCyAwXUaGR1mgozbTusOsFLEiJ7fbQa/h7gcjy2H3V6xppwDNtUSxCJIqp7valBuWVzJ22xuCROXNNZiJkMtms0DbjUkAZjzoDrTMd9dDRI44ZC2YsrYdKWP2WDT2S3N9dNdlRYrGMYc06IURXSYb0igrpWS485xVNS6nF4rwslkoMwnbpgZLB7bmt5uMweAhDEl4B5uSLzzqTnnyVpW2jaJHRMSIjdDiiotvy3DOE5rYTEbkl5yFn28k7JyG4c7AU2HtLH1uKfaiMPI40CdYbpNtmLdwTSn5rewLNld+7TLdeal4WarWBkbVKBjgdElMJJwAAY5fl4kB3b1fp4XvagsGS3FjJfLzDNtS8aeXx7LzT7TyzByQE5PccRGRC0ZRUDRV6y62vbjagzLmJzS2vuPK43JY6aP1TW6Jz+RIWyFtyC06y3EkiiinAo7YCqfq1AqqnGgsOH3lhZO8d1pmcpB8j5XIm9OYlBJSQ/FSS4427DKO0RC8AlcEMhFdViRR1WDWR5t3WXVuL1d106kG9vdeye2g60+1FDyW0shIcXVpyroXt8I8dfd+NB1vioAdWnD3UF1+gD4UFc6CEKpagxXN43rwJLUHz7yX2c8zokt9uHlsPIhA4aRnnHJTLptIS6CNsY7iASpxUUMkReGpfbQW0vtN5pitvrsN28rwtBD0nc0+/Yft5XhaB6TuaXfsP28rwtA9J3NPv2H7eV4Wgek7mn37D9vK8LQPSdzT79h+3leFoHpO5pd+w/byvC0D0nc0u/Yft5XhaB6TuaXfsP28rwtA9J3NLv2H7eV4Wgek7ml37D9vK8LQPSdzS79h+3leFoHpO5p9+w/byvC0E9r7Reazy2HIYVPxkS/CUHVn26cosxyv2g7h89LYmZSXOenvLEQ1YaQ222RATcQCP8rSGqqA8S02W2pQ6FhMoAIlqCtsnwoCpdKClejI4i3Sgtb+GBxVuNBSFt1pV/RQefLjPyUDy4z8lA8uM/JQPLjPyUDy4z8lA8uM/JQPLjPyUDy4z8lA8uM/JQPLjPyUDy4z8lA8utJ/koJ7WCbBU/LQXOPAFq1koK8B0pag90CggtBBf6qB0UDooHRQOigdFA6KB0UDooHRQOigdFA6KB0UDooI0EaBQf//Z" title="Toggle Table of Contents" alt="Toggle Table of Contents" />
</a>
</div>
<div class="wy-grid-for-nav">
<nav data-toggle="wy-nav-shift" class="wy-nav-side">
<div class="wy-side-nav-search">
<a href="../index.html" class="fa fa-home"> CodeIgniter</a>
<div role="search">
<form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
<input type="text" name="q" placeholder="Search docs" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
</div>
<div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
<ul>
<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
</ul>
</li>
</ul>
<ul class="current">
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="benchmark.html">Benchmarking Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li>
<li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="cart.html">Shopping Cart Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="config.html">Config Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="email.html">Email Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="encrypt.html">Encrypt Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="encryption.html">Encryption Library</a></li>
<li class="toctree-l2"><a class="reference internal" href="file_uploading.html">File Uploading Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="form_validation.html">Form Validation</a></li>
<li class="toctree-l2"><a class="reference internal" href="ftp.html">FTP Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="image_lib.html">Image Manipulation Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="input.html">Input Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="javascript.html">Javascript Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="language.html">Language Class</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">Loader Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="migration.html">Migrations Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="output.html">Output Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="pagination.html">Pagination Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="parser.html">Template Parser Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="security.html">Security Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="sessions.html">Session Library</a></li>
<li class="toctree-l2"><a class="reference internal" href="table.html">HTML Table Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="trackback.html">Trackback Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="typography.html">Typography Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="unit_testing.html">Unit Testing Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="uri.html">URI Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="user_agent.html">User Agent Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
<li class="toctree-l2"><a class="reference internal" href="zip.html">Zip Encoding Class</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
</ul>
</li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
</ul>
</li>
</ul>
</div>
</nav>
<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
<nav class="wy-nav-top" role="navigation" aria-label="top navigation">
<i data-toggle="wy-nav-top" class="fa fa-bars"></i>
<a href="../index.html">CodeIgniter</a>
</nav>
<div class="wy-nav-content">
<div class="rst-content">
<div role="navigation" aria-label="breadcrumbs navigation">
<ul class="wy-breadcrumbs">
<li><a href="../index.html">Docs</a> »</li>
<li><a href="index.html">Libraries</a> »</li>
<li>Loader Class</li>
<li class="wy-breadcrumbs-aside">
</li>
<div style="float:right;margin-left:5px;" id="closeMe">
<img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
</div>
</ul>
<hr/>
</div>
<div role="main" class="document">
<div class="section" id="loader-class">
<h1>Loader Class<a class="headerlink" href="#loader-class" title="Permalink to this headline">¶</a></h1>
<p>Loader, as the name suggests, is used to load elements. These elements
can be libraries (classes) <a class="reference internal" href="../general/views.html"><span class="doc">View files</span></a>,
<a class="reference internal" href="../general/drivers.html"><span class="doc">Drivers</span></a>,
<a class="reference internal" href="../general/helpers.html"><span class="doc">Helpers</span></a>,
<a class="reference internal" href="../general/models.html"><span class="doc">Models</span></a>, or your own files.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">This class is initialized automatically by the system so there
is no need to do it manually.</p>
</div>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#application-packages" id="id2">Application “Packages”</a><ul>
<li><a class="reference internal" href="#package-view-files" id="id3">Package view files</a></li>
</ul>
</li>
<li><a class="reference internal" href="#class-reference" id="id4">Class Reference</a></li>
</ul>
</div>
<div class="custom-index container"></div><div class="section" id="application-packages">
<h2><a class="toc-backref" href="#id2">Application “Packages”</a><a class="headerlink" href="#application-packages" title="Permalink to this headline">¶</a></h2>
<p>An application package allows for the easy distribution of complete sets
of resources in a single directory, complete with its own libraries,
models, helpers, config, and language files. It is recommended that
these packages be placed in the application/third_party directory. Below
is a sample map of an package directory.</p>
<p>The following is an example of a directory for an application package
named “Foo Bar”.</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">/</span><span class="nx">application</span><span class="o">/</span><span class="nx">third_party</span><span class="o">/</span><span class="nx">foo_bar</span>
<span class="nx">config</span><span class="o">/</span>
<span class="nx">helpers</span><span class="o">/</span>
<span class="nx">language</span><span class="o">/</span>
<span class="nx">libraries</span><span class="o">/</span>
<span class="nx">models</span><span class="o">/</span>
</pre></div>
</div>
<p>Whatever the purpose of the “Foo Bar” application package, it has its
own config files, helpers, language files, libraries, and models. To use
these resources in your controllers, you first need to tell the Loader
that you are going to be loading resources from a package, by adding the
package path via the <code class="docutils literal"><span class="pre">add_package_path()</span></code> method.</p>
<div class="section" id="package-view-files">
<h3><a class="toc-backref" href="#id3">Package view files</a><a class="headerlink" href="#package-view-files" title="Permalink to this headline">¶</a></h3>
<p>By Default, package view files paths are set when <code class="docutils literal"><span class="pre">add_package_path()</span></code>
is called. View paths are looped through, and once a match is
encountered that view is loaded.</p>
<p>In this instance, it is possible for view naming collisions within
packages to occur, and possibly the incorrect package being loaded. To
ensure against this, set an optional second parameter of FALSE when
calling <code class="docutils literal"><span class="pre">add_package_path()</span></code>.</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">add_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'my_app'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'my_app_index'</span><span class="p">);</span> <span class="c1">// Loads</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'welcome_message'</span><span class="p">);</span> <span class="c1">// Will not load the default welcome_message b/c the second param to add_package_path is FALSE</span>
<span class="c1">// Reset things</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">remove_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'my_app'</span><span class="p">);</span>
<span class="c1">// Again without the second parameter:</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">add_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'my_app'</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'my_app_index'</span><span class="p">);</span> <span class="c1">// Loads</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'welcome_message'</span><span class="p">);</span> <span class="c1">// Loads</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="class-reference">
<h2><a class="toc-backref" href="#id4">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="CI_Loader">
<em class="property">class </em><code class="descname">CI_Loader</code><a class="headerlink" href="#CI_Loader" title="Permalink to this definition">¶</a></dt>
<dd><dl class="method">
<dt id="CI_Loader::library">
<code class="descname">library</code><span class="sig-paren">(</span><em>$library</em><span class="optional">[</span>, <em>$params = NULL</em><span class="optional">[</span>, <em>$object_name = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::library" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$library</strong> (<em>mixed</em>) – Library name as a string or an array with multiple libraries</li>
<li><strong>$params</strong> (<em>array</em>) – Optional array of parameters to pass to the loaded library’s constructor</li>
<li><strong>$object_name</strong> (<em>string</em>) – Optional object name to assign the library to</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<p>This method is used to load core classes.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">We use the terms “class” and “library” interchangeably.</p>
</div>
<p>For example, if you would like to send email with CodeIgniter, the first
step is to load the email class within your controller:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'email'</span><span class="p">);</span>
</pre></div>
</div>
<p>Once loaded, the library will be ready for use, using <code class="docutils literal"><span class="pre">$this->email</span></code>.</p>
<p>Library files can be stored in subdirectories within the main
“libraries” directory, or within your personal <em>application/libraries</em>
directory. To load a file located in a subdirectory, simply include the
path, relative to the “libraries” directory. For example, if you have
file located at:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">libraries</span><span class="o">/</span><span class="nx">flavors</span><span class="o">/</span><span class="nx">Chocolate</span><span class="o">.</span><span class="nx">php</span>
</pre></div>
</div>
<p>You will load it using:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'flavors/chocolate'</span><span class="p">);</span>
</pre></div>
</div>
<p>You may nest the file in as many subdirectories as you want.</p>
<p>Additionally, multiple libraries can be loaded at the same time by
passing an array of libraries to the load method.</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'email'</span><span class="p">,</span> <span class="s1">'table'</span><span class="p">));</span>
</pre></div>
</div>
<p><strong>Setting options</strong></p>
<p>The second (optional) parameter allows you to optionally pass
configuration setting. You will typically pass these as an array:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span> <span class="o">=</span> <span class="k">array</span> <span class="p">(</span>
<span class="s1">'mailtype'</span> <span class="o">=></span> <span class="s1">'html'</span><span class="p">,</span>
<span class="s1">'charset'</span> <span class="o">=></span> <span class="s1">'utf-8'</span><span class="p">,</span>
<span class="s1">'priority'</span> <span class="o">=></span> <span class="s1">'1'</span>
<span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'email'</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span>
</pre></div>
</div>
<p>Config options can usually also be set via a config file. Each library
is explained in detail in its own page, so please read the information
regarding each one you would like to use.</p>
<p>Please take note, when multiple libraries are supplied in an array for
the first parameter, each will receive the same parameter information.</p>
<p><strong>Assigning a Library to a different object name</strong></p>
<p>If the third (optional) parameter is blank, the library will usually be
assigned to an object with the same name as the library. For example, if
the library is named Calendar, it will be assigned to a variable named
<code class="docutils literal"><span class="pre">$this->calendar</span></code>.</p>
<p>If you prefer to set your own class names you can pass its value to the
third parameter:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'calendar'</span><span class="p">,</span> <span class="k">NULL</span><span class="p">,</span> <span class="s1">'my_calendar'</span><span class="p">);</span>
<span class="c1">// Calendar class is now accessed using:</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">my_calendar</span>
</pre></div>
</div>
<p>Please take note, when multiple libraries are supplied in an array for
the first parameter, this parameter is discarded.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::driver">
<code class="descname">driver</code><span class="sig-paren">(</span><em>$library</em><span class="optional">[</span>, <em>$params = NULL</em><span class="optional">[</span>, <em>$object_name</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::driver" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$library</strong> (<em>mixed</em>) – Library name as a string or an array with multiple libraries</li>
<li><strong>$params</strong> (<em>array</em>) – Optional array of parameters to pass to the loaded library’s constructor</li>
<li><strong>$object_name</strong> (<em>string</em>) – Optional object name to assign the library to</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<p>This method is used to load driver libraries, acts very much like the
<code class="docutils literal"><span class="pre">library()</span></code> method.</p>
<p>As an example, if you would like to use sessions with CodeIgniter, the first
step is to load the session driver within your controller:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'session'</span><span class="p">);</span>
</pre></div>
</div>
<p>Once loaded, the library will be ready for use, using <code class="docutils literal"><span class="pre">$this->session</span></code>.</p>
<p>Driver files must be stored in a subdirectory within the main
“libraries” directory, or within your personal <em>application/libraries</em>
directory. The subdirectory must match the parent class name. Read the
<a class="reference internal" href="../general/drivers.html"><span class="doc">Drivers</span></a> description for details.</p>
<p>Additionally, multiple driver libraries can be loaded at the same time by
passing an array of drivers to the load method.</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'session'</span><span class="p">,</span> <span class="s1">'cache'</span><span class="p">));</span>
</pre></div>
</div>
<p><strong>Setting options</strong></p>
<p>The second (optional) parameter allows you to optionally pass
configuration settings. You will typically pass these as an array:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
<span class="s1">'sess_driver'</span> <span class="o">=></span> <span class="s1">'cookie'</span><span class="p">,</span>
<span class="s1">'sess_encrypt_cookie'</span> <span class="o">=></span> <span class="k">true</span><span class="p">,</span>
<span class="s1">'encryption_key'</span> <span class="o">=></span> <span class="s1">'mysecretkey'</span>
<span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'session'</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span>
</pre></div>
</div>
<p>Config options can usually also be set via a config file. Each library
is explained in detail in its own page, so please read the information
regarding each one you would like to use.</p>
<p><strong>Assigning a Driver to a different object name</strong></p>
<p>If the third (optional) parameter is blank, the library will be assigned
to an object with the same name as the parent class. For example, if
the library is named Session, it will be assigned to a variable named
<code class="docutils literal"><span class="pre">$this->session</span></code>.</p>
<p>If you prefer to set your own class names you can pass its value to the
third parameter:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'session'</span><span class="p">,</span> <span class="s1">''</span><span class="p">,</span> <span class="s1">'my_session'</span><span class="p">);</span>
<span class="c1">// Session class is now accessed using:</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">my_session</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::view">
<code class="descname">view</code><span class="sig-paren">(</span><em>$view</em><span class="optional">[</span>, <em>$vars = array()</em><span class="optional">[</span>, <em>return = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::view" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$view</strong> (<em>string</em>) – View name</li>
<li><strong>$vars</strong> (<em>array</em>) – An associative array of variables</li>
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the loaded view</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">View content string if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
</td>
</tr>
</tbody>
</table>
<p>This method is used to load your View files. If you haven’t read the
<a class="reference internal" href="../general/views.html"><span class="doc">Views</span></a> section of the user guide it is
recommended that you do since it shows you how this method is
typically used.</p>
<p>The first parameter is required. It is the name of the view file you
would like to load.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The .php file extension does not need to be specified unless
you use something other than .php.</p>
</div>
<p>The second <strong>optional</strong> parameter can take an associative array or an
object as input, which it runs through the PHP
<a class="reference external" href="http://php.net/extract">extract()</a> function to convert to variables
that can be used in your view files. Again, read the
<a class="reference internal" href="../general/views.html"><span class="doc">Views</span></a> page to learn how this might be useful.</p>
<p>The third <strong>optional</strong> parameter lets you change the behavior of the
method so that it returns data as a string rather than sending it to
your browser. This can be useful if you want to process the data in some
way. If you set the parameter to TRUE (boolean) it will return data. The
default behavior is FALSE, which sends it to your browser. Remember to
assign it to a variable if you want the data returned:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$string</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'myfile'</span><span class="p">,</span> <span class="s1">''</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::vars">
<code class="descname">vars</code><span class="sig-paren">(</span><em>$vars</em><span class="optional">[</span>, <em>$val = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::vars" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$vars</strong> (<em>mixed</em>) – An array of variables or a single variable name</li>
<li><strong>$val</strong> (<em>mixed</em>) – Optional variable value</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<p>This method takes an associative array as input and generates
variables using the PHP <a class="reference external" href="http://php.net/extract">extract()</a>
function. This method produces the same result as using the second
parameter of the <code class="docutils literal"><span class="pre">$this->load->view()</span></code> method above. The reason you
might want to use this method independently is if you would like to
set some global variables in the constructor of your controller and have
them become available in any view file loaded from any method. You can
have multiple calls to this method. The data get cached and merged
into one array for conversion to variables.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::get_var">
<code class="descname">get_var</code><span class="sig-paren">(</span><em>$key</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::get_var" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$key</strong> (<em>string</em>) – Variable name key</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Value if key is found, NULL if not</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
</td>
</tr>
</tbody>
</table>
<p>This method checks the associative array of variables available to
your views. This is useful if for any reason a var is set in a library
or another controller method using <code class="docutils literal"><span class="pre">$this->load->vars()</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::get_vars">
<code class="descname">get_vars</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::get_vars" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">An array of all assigned view variables</td>
</tr>
<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td>
</tr>
</tbody>
</table>
<p>This method retrieves all variables available to your views.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::clear_vars">
<code class="descname">clear_vars</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::clear_vars" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_Loader instance (method chaining)</td>
</tr>
<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_Loader</td>
</tr>
</tbody>
</table>
<p>Clears cached view variables.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::model">
<code class="descname">model</code><span class="sig-paren">(</span><em>$model</em><span class="optional">[</span>, <em>$name = ''</em><span class="optional">[</span>, <em>$db_conn = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::model" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$model</strong> (<em>mixed</em>) – Model name or an array containing multiple models</li>
<li><strong>$name</strong> (<em>string</em>) – Optional object name to assign the model to</li>
<li><strong>$db_conn</strong> (<em>string</em>) – Optional database configuration group to load</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">);</span>
</pre></div>
</div>
<p>If your model is located in a subdirectory, include the relative path
from your models directory. For example, if you have a model located at
<em>application/models/blog/Queries.php</em> you’ll load it using:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'blog/queries'</span><span class="p">);</span>
</pre></div>
</div>
<p>If you would like your model assigned to a different object name you can
specify it via the second parameter of the loading method:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">,</span> <span class="s1">'fubar'</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">fubar</span><span class="o">-></span><span class="na">method</span><span class="p">();</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::database">
<code class="descname">database</code><span class="sig-paren">(</span><span class="optional">[</span><em>$params = ''</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">[</span>, <em>$query_builder = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::database" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$params</strong> (<em>mixed</em>) – Database group name or configuration options</li>
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the loaded database object</li>
<li><strong>$query_builder</strong> (<em>bool</em>) – Whether to load the Query Builder</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Loaded CI_DB instance or FALSE on failure if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
</td>
</tr>
</tbody>
</table>
<p>This method lets you load the database class. The two parameters are
<strong>optional</strong>. Please see the <a class="reference internal" href="../database/index.html"><span class="doc">database</span></a>
section for more info.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::dbforge">
<code class="descname">dbforge</code><span class="sig-paren">(</span><span class="optional">[</span><em>$db = NULL</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::dbforge" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$db</strong> (<em>object</em>) – Database object</li>
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the Database Forge instance</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Loaded CI_DB_forge instance if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
</td>
</tr>
</tbody>
</table>
<p>Loads the <a class="reference internal" href="../database/forge.html"><span class="doc">Database Forge</span></a> class, please refer
to that manual for more info.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::dbutil">
<code class="descname">dbutil</code><span class="sig-paren">(</span><span class="optional">[</span><em>$db = NULL</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::dbutil" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$db</strong> (<em>object</em>) – Database object</li>
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the Database Utilities instance</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Loaded CI_DB_utility instance if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
</td>
</tr>
</tbody>
</table>
<p>Loads the <a class="reference internal" href="../database/utilities.html"><span class="doc">Database Utilities</span></a> class, please
refer to that manual for more info.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::helper">
<code class="descname">helper</code><span class="sig-paren">(</span><em>$helpers</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::helper" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$helpers</strong> (<em>mixed</em>) – Helper name as a string or an array containing multiple helpers</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<p>This method loads helper files, where file_name is the name of the
file, without the _helper.php extension.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::file">
<code class="descname">file</code><span class="sig-paren">(</span><em>$path</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::file" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$path</strong> (<em>string</em>) – File path</li>
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the loaded file</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">File contents if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
</td>
</tr>
</tbody>
</table>
<p>This is a generic file loading method. Supply the filepath and name in
the first parameter and it will open and read the file. By default the
data is sent to your browser, just like a View file, but if you set the
second parameter to boolean TRUE it will instead return the data as a
string.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::language">
<code class="descname">language</code><span class="sig-paren">(</span><em>$files</em><span class="optional">[</span>, <em>$lang = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::language" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$files</strong> (<em>mixed</em>) – Language file name or an array of multiple language files</li>
<li><strong>$lang</strong> (<em>string</em>) – Language name</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<p>This method is an alias of the <a class="reference internal" href="language.html"><span class="doc">language loading
method</span></a>: <code class="docutils literal"><span class="pre">$this->lang->load()</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::config">
<code class="descname">config</code><span class="sig-paren">(</span><em>$file</em><span class="optional">[</span>, <em>$use_sections = FALSE</em><span class="optional">[</span>, <em>$fail_gracefully = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::config" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$file</strong> (<em>string</em>) – Configuration file name</li>
<li><strong>$use_sections</strong> (<em>bool</em>) – Whether configuration values should be loaded into their own section</li>
<li><strong>$fail_gracefully</strong> (<em>bool</em>) – Whether to just return FALSE in case of failure</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
</td>
</tr>
</tbody>
</table>
<p>This method is an alias of the <a class="reference internal" href="config.html"><span class="doc">config file loading
method</span></a>: <code class="docutils literal"><span class="pre">$this->config->load()</span></code></p>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::is_loaded">
<code class="descname">is_loaded</code><span class="sig-paren">(</span><em>$class</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::is_loaded" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$class</strong> (<em>string</em>) – Class name</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Singleton property name if found, FALSE if not</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
</td>
</tr>
</tbody>
</table>
<p>Allows you to check if a class has already been loaded or not.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The word “class” here refers to libraries and drivers.</p>
</div>
<p>If the requested class has been loaded, the method returns its assigned
name in the CI Super-object and FALSE if it’s not:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'form_validation'</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">is_loaded</span><span class="p">(</span><span class="s1">'Form_validation'</span><span class="p">);</span> <span class="c1">// returns 'form_validation'</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">is_loaded</span><span class="p">(</span><span class="s1">'Nonexistent_library'</span><span class="p">);</span> <span class="c1">// returns FALSE</span>
</pre></div>
</div>
<div class="admonition important">
<p class="first admonition-title">Important</p>
<p class="last">If you have more than one instance of a class (assigned to
different properties), then the first one will be returned.</p>
</div>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'form_validation'</span><span class="p">,</span> <span class="nv">$config</span><span class="p">,</span> <span class="s1">'fv'</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'form_validation'</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">is_loaded</span><span class="p">(</span><span class="s1">'Form_validation'</span><span class="p">);</span> <span class="c1">// returns 'fv'</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::add_package_path">
<code class="descname">add_package_path</code><span class="sig-paren">(</span><em>$path</em><span class="optional">[</span>, <em>$view_cascade = TRUE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::add_package_path" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$path</strong> (<em>string</em>) – Path to add</li>
<li><strong>$view_cascade</strong> (<em>bool</em>) – Whether to use cascading views</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<p>Adding a package path instructs the Loader class to prepend a given path
for subsequent requests for resources. As an example, the “Foo Bar”
application package above has a library named Foo_bar.php. In our
controller, we’d do the following:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">add_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'third_party/foo_bar/'</span><span class="p">)</span>
<span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'foo_bar'</span><span class="p">);</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::remove_package_path">
<code class="descname">remove_package_path</code><span class="sig-paren">(</span><span class="optional">[</span><em>$path = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::remove_package_path" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$path</strong> (<em>string</em>) – Path to remove</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
</td>
</tr>
</tbody>
</table>
<p>When your controller is finished using resources from an application
package, and particularly if you have other application packages you
want to work with, you may wish to remove the package path so the Loader
no longer looks in that directory for resources. To remove the last path
added, simply call the method with no parameters.</p>
<p>Or to remove a specific package path, specify the same path previously
given to <code class="docutils literal"><span class="pre">add_package_path()</span></code> for a package.:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">remove_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'third_party/foo_bar/'</span><span class="p">);</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="CI_Loader::get_package_paths">
<code class="descname">get_package_paths</code><span class="sig-paren">(</span><span class="optional">[</span><em>$include_base = TRUE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::get_package_paths" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$include_base</strong> (<em>bool</em>) – Whether to include BASEPATH</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">An array of package paths</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
</td>
</tr>
</tbody>
</table>
<p>Returns all currently available package paths.</p>
</dd></dl>
</dd></dl>
</div>
</div>
</div>
<footer>
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
<a href="migration.html" class="btn btn-neutral float-right" title="Migrations Class">Next <span class="fa fa-arrow-circle-right"></span></a>
<a href="language.html" class="btn btn-neutral" title="Language Class"><span class="fa fa-arrow-circle-left"></span> Previous</a>
</div>
<hr/>
<div role="contentinfo">
<p>
© Copyright 2014 - 2019, British Columbia Institute of Technology.
Last updated on Jan 16, 2019.
</p>
</div>
Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
</footer>
</div>
</div>
</section>
</div>
<script type="text/javascript">
var DOCUMENTATION_OPTIONS = {
URL_ROOT:'../',
VERSION:'3.1.10',
COLLAPSE_INDEX:false,
FILE_SUFFIX:'.html',
HAS_SOURCE: false
};
</script>
<script type="text/javascript" src="../_static/jquery.js"></script>
<script type="text/javascript" src="../_static/underscore.js"></script>
<script type="text/javascript" src="../_static/doctools.js"></script>
<script type="text/javascript" src="../_static/js/theme.js"></script>
<script type="text/javascript">
jQuery(function () {
SphinxRtdTheme.StickyNav.enable();
});
</script>
</body>
</html>
|
