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<title>Security Helper : CodeIgniter User Guide</title>
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<td><h1>CodeIgniter User Guide Version 1.7.1</h1></td>
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<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
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<a href="../index.html">User Guide Home</a> ›
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Security Helper
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<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>
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<h1>Security Helper</h1>
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<p>The Security Helper file contains security related functions.</p>
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<h2>Loading this Helper</h2>
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<p>This helper is loaded using the following code:</p>
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<code>$this->load->helper('security');</code>
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<p>The following functions are available:</p>
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<h2>xss_clean()</h2>
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<p>Provides Cross Site Script Hack filtering. This function is an alias to the one in the
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<a href="../libraries/input.html">Input class</a>. More info can be found there.</p>
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<h2>dohash()</h2>
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<p>Permits you to create SHA1 or MD5 one way hashes suitable for encrypting passwords. Will create SHA1 by default. Examples:</p>
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<code>
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$str = dohash($str); // SHA1<br />
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<br />
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$str = dohash($str, 'md5'); // MD5
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</code>
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<h2>strip_image_tags()</h2>
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<p>This is a security function that will strip image tags from a string. It leaves the image URL as plain text.</p>
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<code>$string = strip_image_tags($string);</code>
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<h2>encode_php_tags()</h2>
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<p>This is a security function that converts PHP tags to entities. Note: If you use the XSS filtering function it does this automatically.</p>
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<code>$string = encode_php_tags($string);</code>
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<p>
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Previous Topic: <a href="path_helper.html"> Path Helper</a>
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·
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<a href="#top">Top of Page</a> ·
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<a href="../index.html">User Guide Home</a> ·
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Next Topic: <a href="smiley_helper.html">Smiley Helper</a></p>
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