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<td><h1>CodeIgniter User Guide Version 1.5.3</h1></td>
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<a href="http://www.codeigniter.com/">CodeIgniter Home</a> ›
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String Helper
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<h1>String Helper</h1>
<p>The String Helper file contains functions that assist in working with strings.</p>
<h2>Loading this Helper</h2>
<p>This helper is loaded using the following code:</p>
<code>$this->load->helper('string');</code>
<p>The following functions are available:</p>
<h2>random_string()</h2>
<p>Generates a random string based on the type and length you specify. Useful for creating passwords or generating random hashes.</p>
<p>The first parameter specifies the type of string, the second parameter specifies the length. The following choices are available:</p>
<ul>
<li><strong>alnum</strong>: Alpha-numeric string with lower and uppercase characters.</li>
<li><strong>numeric</strong>: Numeric string.</li>
<li><strong>nozero</strong>: Numeric string with no zeros.</li>
<li><strong>unique</strong>: Encrypted with MD5 and uniquid(). Note: The length parameter is not available for this type.
Returns a fixed length 33 character string.</li>
</ul>
<p>Usage example:</p>
<code>echo random_string('alnum', 16);</code>
<h2>alternator()</h2>
<p>Allows two or more items to be alternated between, when cycling through a loop. Example:</p>
<code>for ($i = 0; $i < 10; $i++)<br />
{<br />
echo alternator('string one', 'string two');<br />
}<br />
</code>
<p>You can add as many parameters as you want, and with each iteration of your loop the next item will be returned.</p>
<code>for ($i = 0; $i < 10; $i++)<br />
{<br />
echo alternator('one', 'two', 'three', 'four', 'five');<br />
}<br />
</code>
<p><strong>Note:</strong> To use multiple separate calls to this function simply call the function with no arguments to re-initialize.</p>
<h2>repeater()</h2>
<p>Generates repeating copies of the data you submit. Example:</p>
<code>$string = "\n";<br />
echo repeater($string, 30);</code>
<p>The above would generate 30 newlines.</p>
<h2>reduce_double_slashes()</h2>
<p>onverts double slashes in a string to a single slash, except those found in http://. Example: </p>
<code>$string = "http://www.some-site.com//index.php";<br />
echo reduce_double_slashes($string); // results in "http://www.some-site.com/index.php"</code>
<h2>trim_slashes()</h2>
<p>Removes any leading/traling slashes from a string. Example:<br />
<br />
<code>$string = "/this/that/theother/";<br />
echo trim_slashes($string); // results in this/that/theother</code></p>
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