119 lines
4.9 KiB
HTML
119 lines
4.9 KiB
HTML
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<td><h1>CodeIgniter User Guide Version 1.7.3</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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Array 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>Array Helper</h1>
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<p>The Array Helper file contains functions that assist in working with arrays.</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>$this->load->helper('array');</code>
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<p>The following functions are available:</p>
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<h2>element()</h2>
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<p>Lets you fetch an item from an array. The function tests whether the array index is set and whether it has a value. If
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a value exists it is returned. If a value does not exist it returns FALSE, or whatever you've specified as the default value via the third parameter. Example:</p>
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<code>
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$array = array('color' => 'red', 'shape' => 'round', 'size' => '');<br />
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<br />
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// returns "red"<br />
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echo element('color', $array);<br />
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<br />
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// returns NULL<br />
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echo element('size', $array, NULL);
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</code>
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<h2>random_element()</h2>
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<p>Takes an array as input and returns a random element from it. Usage example:</p>
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<code>$quotes = array(<br />
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"I find that the harder I work, the more luck I seem to have. - Thomas Jefferson",<br />
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"Don't stay in bed, unless you can make money in bed. - George Burns",<br />
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"We didn't lose the game; we just ran out of time. - Vince Lombardi",<br />
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"If everything seems under control, you're not going fast enough. - Mario Andretti",<br />
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"Reality is merely an illusion, albeit a very persistent one. - Albert Einstein",<br />
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"Chance favors the prepared mind - Louis Pasteur"<br />
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);<br />
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<br />
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echo random_element($quotes);</code>
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</div>
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<p>
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Previous Topic: <a href="../libraries/zip.html">Zip Encoding Class</a> ·
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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="compatibility_helper.html">Compatibility Helper</a></p>
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<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2010 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
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