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
|
###########
File Helper
###########
The File Helper file contains functions that assist in working with files.
.. contents:: Page Contents
Loading this Helper
===================
This helper is loaded using the following code::
$this->load->helper('file');
The following functions are available:
read_file()
===========
.. php:function:: read_file($file)
:param string $file: File path
:returns: string or FALSE on failure
Returns the data contained in the file specified in the path.
Example::
$string = read_file('./path/to/file.php');
The path can be a relative or full server path. Returns FALSE (boolean) on failure.
.. note:: The path is relative to your main site index.php file, NOT your
controller or view files. CodeIgniter uses a front controller so paths
are always relative to the main site index.
.. note:: This function is DEPRECATED. Use the native ``file_get_contents()``
instead.
.. important:: If your server is running an **open_basedir** restriction this
function might not work if you are trying to access a file above the
calling script.
write_file()
============
.. php:function:: write_file($path, $data, $mode = 'wb')
:param string $path: File path
:param string $data: Data to write to file
:param string $mode: ``fopen()`` mode
:returns: bool
Writes data to the file specified in the path. If the file does not exist then the
function will create it.
Example::
$data = 'Some file data';
if ( ! write_file('./path/to/file.php', $data))
{ Â Â Â Â
echo 'Unable to write the file';
}
else
{ Â Â Â Â
echo 'File written!';
}
You can optionally set the write mode via the third parameter::
write_file('./path/to/file.php', $data, 'r+');
The default mode is 'wb'. Please see the `PHP user guide <http://php.net/fopen>`_
for mode options.
.. note: In order for this function to write data to a file, its permissions must
be set such that it is writable (666, 777, etc.). If the file does not
already exist, the directory containing it must be writable.
.. note:: The path is relative to your main site index.php file, NOT your
controller or view files. CodeIgniter uses a front controller so paths
are always relative to the main site index.
.. note:: This function acquires an exclusive lock on the file while writing to it.
delete_files()
==============
.. php:function:: delete_files($path, $del_dir = FALSE, $htdocs = FALSE)
:param string $path: Directory path
:param bool $del_dir: Whether to also delete directories
:param bool $htdocs: Whether to skip deleting .htaccess and index page files
:returns: bool
Deletes ALL files contained in the supplied path.
Example::
delete_files('./path/to/directory/');
If the second parameter is set to TRUE, any directories contained within the supplied
root path will be deleted as well.
Example::
delete_files('./path/to/directory/', TRUE);
.. note:: The files must be writable or owned by the system in order to be deleted.
get_filenames()
===============
.. php:function:: get_filenames($source_dir, $include_path = FALSE)
:param string $source_dir: Directory path
:param bool $include_path: Whether to include the path as part of the filenames
:returns: array
Takes a server path as input and returns an array containing the names of all files
contained within it. The file path can optionally be added to the file names by setting
the second parameter to TRUE.
Example::
$controllers = get_filenames(APPPATH.'controllers/');
get_dir_file_info()
===================
.. php:function:: get_dir_file_info($source_dir, $top_level_only)
:param string $source_dir: Directory path
:param bool $top_level_only: Whether to look only at the specified directory
(excluding sub-directories)
:returns: array
Reads the specified directory and builds an array containing the filenames, filesize,
dates, and permissions. Sub-folders contained within the specified path are only read
if forced by sending the second parameter to FALSE, as this can be an intensive
operation.
Example::
$models_info = get_dir_file_info(APPPATH.'models/');
get_file_info()
===============
.. php:function: get_file_info($file, $returned_values = array('name', 'server_path', 'size', 'date'))
:param string $file: File path
:param array $returned_values: What type of info to return
:returns: array or FALSE on failure
Given a file and path, returns (optionally) the *name*, *path*, *size* and *date modified*
information attributes for a file. Second parameter allows you to explicitly declare what
information you want returned.
Valid ``$returned_values`` options are: `name`, `size`, `date`, `readable`, `writeable`,
`executable` and `fileperms`.
.. note:: The *writable* attribute is checked via PHP's ``is_writeable()`` function, which
known to have issues on the IIS webserver. Consider using *fileperms* instead,
which returns information from PHP's ``fileperms()`` function.
get_mime_by_extension()
=======================
.. php:function:: get_mime_by_extension($filename)
:param string $filename: File name
:returns: string or FALSE on failure
Translates a filename extension into a MIME type based on *config/mimes.php*.
Returns FALSE if it can't determine the type, or read the MIME config file.
::
$file = 'somefile.png';
echo $file.' is has a mime type of '.get_mime_by_extension($file);
.. note:: This is not an accurate way of determining file MIME types, and
is here strictly for convenience. It should not be used for security
purposes.
symbolic_permissions()
======================
.. php:function:: symbolic_permissions($perms)
:param int $perms: Permissions
:returns: string
Takes numeric permissions (such as is returned by ``fileperms()``) and returns
standard symbolic notation of file permissions.
::
echo symbolic_permissions(fileperms('./index.php')); // -rw-r--r--
octal_permissions()
===================
.. php:function:: octal_permissions($perms)
:param int $perms: Permissions
:returns: string
Takes numeric permissions (such as is returned by ``fileperms()``) and returns
a three character octal notation of file permissions.
::
echo octal_permissions(fileperms('./index.php')); // 644
|
