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
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>CodeIgniter User Guide : Alternate PHP Syntax for View Files</title>
<style type='text/css' media='all'>@import url('../userguide.css');</style>
<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
<script type="text/javascript" src="../nav/nav.js"></script>
<script type="text/javascript" src="../nav/prototype.lite.js"></script>
<script type="text/javascript" src="../nav/moo.fx.js"></script>
<script type="text/javascript" src="../nav/user_guide_menu.js"></script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv='expires' content='-1' />
<meta http-equiv= 'pragma' content='no-cache' />
<meta name='robots' content='all' />
<meta name='author' content='ExpressionEngine Dev Team' />
<meta name='description' content='CodeIgniter User Guide' />
</head>
<body>
<!-- START NAVIGATION -->
<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle.jpg" width="153" height="44" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
<div id="masthead">
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
<tr>
<td><h1>CodeIgniter User Guide Version 1.6.0</h1></td>
<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
</tr>
</table>
</div>
<!-- END NAVIGATION -->
<!-- START BREADCRUMB -->
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
<tr>
<td id="breadcrumb">
<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
<a href="../index.html">User Guide Home</a> ›
Alternate PHP Syntax
</td>
<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
</tr>
</table>
<!-- END BREADCRUMB -->
<br clear="all" />
<!-- START CONTENT -->
<div id="content">
<h1>Alternate PHP Syntax for View Files</h1>
<p>If you do not utilize CodeIgniter's <a href="../libraries/parser.html">template engine</a>, you'll be using pure PHP
in your View files. To minimize the PHP code in these files, and to make it easier to identify the code blocks it is recommended that you use
PHPs alternative syntax for control structures and short tag echo statements. If you are not familiar with this syntax, it allows you to eliminate the braces from your code,
and eliminate "echo" statements.</p>
<h2>Automatic Short Tag Support</h2>
<p><strong>Note:</strong> If you find that the syntax described in this page does not work on your server it might
be that "short tags" are disabled in your PHP ini file. CodeIgniter will optionally rewrite short tags on-the-fly,
allowing you to use that syntax even if your server doesn't support it. This feature can be enabled in your
<dfn>config/config.php</dfn> file.</p>
<p class="important">Please note that if you do use this feature, if PHP errors are encountered
in your <strong>view files</strong>, the error message and line number will not be accurately shown. Instead, all errors
will be shown as <kbd>eval()</kbd> errors.</p>
<h2>Alternative Echos</h2>
<p>Normally to echo, or print out a variable you would do this:</p>
<code><?php echo $variable; ?></code>
<p>With the alternative syntax you can instead do it this way:</p>
<code><?=$variable?></code>
<h2>Alternative Control Structures</h2>
<p>Controls structures, like <var>if</var>, <var>for</var>, <var>foreach</var>, and <var>while</var> can be
written in a simplified format as well. Here is an example using foreach:</p>
<code>
<ul><br />
<br />
<var><?php foreach($todo as $item): ?></var><br />
<br />
<li><var><?=$item?></var></li><br />
<br />
<var><?php endforeach; ?></var><br />
<br />
</ul></code>
<p>Notice that there are no braces. Instead, the end brace is replaced with <var>endforeach</var>.
Each of the control structures listed above has a similar closing syntax:
<var>endif</var>, <var>endfor</var>, <var>endforeach</var>, and <var>endwhile</var></p>
<p>Also notice that instead of using a semicolon after each structure (except the last one), there is a colon. This is
important!</p>
<p>Here is another example, using if/elseif/else. Notice the colons:</p>
<code><var><?php if ($username == 'sally'): ?></var><br />
<br />
<h3>Hi Sally</h3><br />
<br />
<var><?php elseif ($username == 'joe'): ?></var><br />
<br />
<h3>Hi Joe</h3><br />
<br />
<var><?php else: ?></var><br />
<br />
<h3>Hi unknown user</h3><br />
<br />
<var><?php endif; ?></var></code>
</div>
<!-- END CONTENT -->
<div id="footer">
<p>
Previous Topic: <a href="managing_apps.html">Managing Applications</a>
·
<a href="#top">Top of Page</a> ·
<a href="../index.html">User Guide Home</a> ·
Next Topic: <a href="security.html">Security</a>
</p>
<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2007 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
</div>
</body>
</html>
|
