| 1 |
lars |
1 |
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
|
2 |
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
|
|
3 |
<head>
|
|
|
4 |
|
|
|
5 |
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
|
6 |
<title>File Helper : CodeIgniter User Guide</title>
|
|
|
7 |
|
|
|
8 |
<style type='text/css' media='all'>@import url('../userguide.css');</style>
|
|
|
9 |
<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
|
|
|
10 |
|
|
|
11 |
<script type="text/javascript" src="../nav/nav.js"></script>
|
|
|
12 |
<script type="text/javascript" src="../nav/prototype.lite.js"></script>
|
|
|
13 |
<script type="text/javascript" src="../nav/moo.fx.js"></script>
|
|
|
14 |
<script type="text/javascript" src="../nav/user_guide_menu.js"></script>
|
|
|
15 |
|
|
|
16 |
<meta http-equiv='expires' content='-1' />
|
|
|
17 |
<meta http-equiv= 'pragma' content='no-cache' />
|
|
|
18 |
<meta name='robots' content='all' />
|
|
|
19 |
<meta name='author' content='ExpressionEngine Dev Team' />
|
|
|
20 |
<meta name='description' content='CodeIgniter User Guide' />
|
|
|
21 |
</head>
|
|
|
22 |
<body>
|
|
|
23 |
|
|
|
24 |
<!-- START NAVIGATION -->
|
|
|
25 |
<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
|
|
|
26 |
<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
|
|
|
27 |
<div id="masthead">
|
|
|
28 |
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
|
|
29 |
<tr>
|
|
|
30 |
<td><h1>CodeIgniter User Guide Version 1.7.1</h1></td>
|
|
|
31 |
<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
|
|
|
32 |
</tr>
|
|
|
33 |
</table>
|
|
|
34 |
</div>
|
|
|
35 |
<!-- END NAVIGATION -->
|
|
|
36 |
|
|
|
37 |
|
|
|
38 |
<!-- START BREADCRUMB -->
|
|
|
39 |
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
|
|
40 |
<tr>
|
|
|
41 |
<td id="breadcrumb">
|
|
|
42 |
<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
|
|
|
43 |
<a href="../index.html">User Guide Home</a> ›
|
|
|
44 |
File Helper
|
|
|
45 |
</td>
|
|
|
46 |
<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>
|
|
|
47 |
</tr>
|
|
|
48 |
</table>
|
|
|
49 |
<!-- END BREADCRUMB -->
|
|
|
50 |
|
|
|
51 |
<br clear="all" />
|
|
|
52 |
|
|
|
53 |
|
|
|
54 |
<!-- START CONTENT -->
|
|
|
55 |
<div id="content">
|
|
|
56 |
|
|
|
57 |
|
|
|
58 |
<h1>File Helper</h1>
|
|
|
59 |
|
|
|
60 |
<p>The File Helper file contains functions that assist in working with files.</p>
|
|
|
61 |
|
|
|
62 |
|
|
|
63 |
<h2>Loading this Helper</h2>
|
|
|
64 |
|
|
|
65 |
<p>This helper is loaded using the following code:</p>
|
|
|
66 |
<code>$this->load->helper('file');</code>
|
|
|
67 |
|
|
|
68 |
<p>The following functions are available:</p>
|
|
|
69 |
|
|
|
70 |
<h2>read_file('<var>path</var>')</h2>
|
|
|
71 |
|
|
|
72 |
<p>Returns the data contained in the file specified in the path. Example:</p>
|
|
|
73 |
|
|
|
74 |
<code>$string = read_file('./path/to/file.php');</code>
|
|
|
75 |
|
|
|
76 |
<p>The path can be a relative or full server path. Returns FALSE (boolean) on failure.</p>
|
|
|
77 |
|
|
|
78 |
<p class="important"><strong>Note:</strong> The path is relative to your main site index.php file, NOT your controller or view files.
|
|
|
79 |
CodeIgniter uses a front controller so paths are always relative to the main site index.</p>
|
|
|
80 |
|
|
|
81 |
<p>If your server is running an open_basedir restriction this function
|
|
|
82 |
might not work if you are trying to access a file above the calling script.</p>
|
|
|
83 |
|
|
|
84 |
<h2>write_file('<var>path</var>', <kbd>$data</kbd>)</h2>
|
|
|
85 |
|
|
|
86 |
<p>Writes data to the file specified in the path. If the file does not exist the function will create it. Example:</p>
|
|
|
87 |
|
|
|
88 |
<code>
|
|
|
89 |
$data = 'Some file data';<br />
|
|
|
90 |
<br />
|
|
|
91 |
if ( ! write_file('./path/to/file.php', $data))<br />
|
|
|
92 |
{<br />
|
|
|
93 |
echo 'Unable to write the file';<br />
|
|
|
94 |
}<br />
|
|
|
95 |
else<br />
|
|
|
96 |
{<br />
|
|
|
97 |
echo 'File written!';<br />
|
|
|
98 |
}</code>
|
|
|
99 |
|
|
|
100 |
<p>You can optionally set the write mode via the third parameter:</p>
|
|
|
101 |
|
|
|
102 |
<code>write_file('./path/to/file.php', $data, <var>'r+'</var>);</code>
|
|
|
103 |
|
|
|
104 |
<p>The default mode is <kbd>wb</kbd>. Please see the <a href="http://php.net/fopen">PHP user guide</a> for mode options.</p>
|
|
|
105 |
|
|
|
106 |
<p>Note: In order for this function to write data to a file its file permissions must be set such that it is writable (666, 777, etc.).
|
|
|
107 |
If the file does not already exist, the directory containing it must be writable.</p>
|
|
|
108 |
|
|
|
109 |
<p class="important"><strong>Note:</strong> The path is relative to your main site index.php file, NOT your controller or view files.
|
|
|
110 |
CodeIgniter uses a front controller so paths are always relative to the main site index.</p>
|
|
|
111 |
|
|
|
112 |
<h2>delete_files('<var>path</var>')</h2>
|
|
|
113 |
|
|
|
114 |
<p>Deletes ALL files contained in the supplied path. Example:</p>
|
|
|
115 |
<code>delete_files('./path/to/directory/');</code>
|
|
|
116 |
|
|
|
117 |
<p>If the second parameter is set to <kbd>true</kbd>, any directories contained within the supplied root path will be deleted as well. Example:</p>
|
|
|
118 |
|
|
|
119 |
<code>delete_files('./path/to/directory/', TRUE);</code>
|
|
|
120 |
|
|
|
121 |
<p class="important"><strong>Note:</strong> The files must be writable or owned by the system in order to be deleted.</p>
|
|
|
122 |
|
|
|
123 |
<h2>get_filenames('<var>path/to/directory/</var>')</h2>
|
|
|
124 |
|
|
|
125 |
<p>Takes a server path as input and returns an array containing the names of all files contained within it. The file path
|
|
|
126 |
can optionally be added to the file names by setting the second parameter to TRUE.</p>
|
|
|
127 |
|
|
|
128 |
<h2>get_dir_file_info('<var>path/to/directory/</var>')</h2>
|
|
|
129 |
|
|
|
130 |
<p>Reads the specified directory and builds an array containing the filenames, filesize, dates, and permissions. Any sub-folders contained within the specified path are read as well.</p>
|
|
|
131 |
|
|
|
132 |
<h2>get_file_info('<var>path/to/file</var>', <kbd>$file_information</kbd>)</h2>
|
|
|
133 |
|
|
|
134 |
<p>Given a file and path, returns the name, path, size, date modified. Second parameter allows you to explicitly declare what information you want returned; options are: name, server_path, size, date, readable, writable, executable, fileperms. Returns FALSE if the file cannot be found.</p>
|
|
|
135 |
|
|
|
136 |
<p class="important"><strong>Note:</strong> The "writable" uses the PHP function is_writable() which is known to have issues on the IIS webserver. Consider using fileperms instead, which returns information from PHP's fileperms() function.</p>
|
|
|
137 |
<h2>get_mime_by_extension('<var>file</var>')</h2>
|
|
|
138 |
|
|
|
139 |
<p>Translates a file extension into a mime type based on config/mimes.php. Returns FALSE if it can't determine the type, or open the mime config file.</p>
|
|
|
140 |
<p>
|
|
|
141 |
<code>$file = "somefile.png";<br />
|
|
|
142 |
echo $file . ' is has a mime type of ' . get_mime_by_extension($file);</code>
|
|
|
143 |
</p>
|
|
|
144 |
<p class="critical"><strong>Note:</strong> This is not an accurate way of determining file mime types, and is here strictly as a convenience. It should not be used for security.</p>
|
|
|
145 |
|
|
|
146 |
<h2>symbolic_permissions(<kbd>$perms</kbd>)</h2>
|
|
|
147 |
|
|
|
148 |
<p>Takes numeric permissions (such as is returned by <kbd>fileperms()</kbd> and returns standard symbolic notation of file permissions.</p>
|
|
|
149 |
|
|
|
150 |
<code>echo symbolic_permissions(fileperms('./index.php'));<br />
|
|
|
151 |
<br />
|
|
|
152 |
// -rw-r--r--</code>
|
|
|
153 |
|
|
|
154 |
<h2>octal_permissions(<kbd>$perms</kbd>)</h2>
|
|
|
155 |
|
|
|
156 |
<p>Takes numeric permissions (such as is returned by <kbd>fileperms()</kbd> and returns a three character octal notation of file permissions.</p>
|
|
|
157 |
|
|
|
158 |
<code>echo octal_permissions(fileperms('./index.php'));<br />
|
|
|
159 |
<br />
|
|
|
160 |
// 644</code>
|
|
|
161 |
|
|
|
162 |
</div>
|
|
|
163 |
|
|
|
164 |
<!-- END CONTENT -->
|
|
|
165 |
|
|
|
166 |
|
|
|
167 |
<div id="footer">
|
|
|
168 |
<p>
|
|
|
169 |
Previous Topic: <a href="email_helper.html">Email Helper</a>
|
|
|
170 |
·
|
|
|
171 |
<a href="#top">Top of Page</a> ·
|
|
|
172 |
<a href="../index.html">User Guide Home</a> ·
|
|
|
173 |
Next Topic: <a href="form_helper.html">Form Helper</a></p>
|
|
|
174 |
<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
|
|
|
175 |
</div>
|
|
|
176 |
|
|
|
177 |
</body>
|
|
|
178 |
</html>
|