| admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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| 3 | <head>
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| 5 | <title>Code Igniter User Guide</title>
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| 7 | <style type='text/css' media='all'>@import url('../userguide.css');</style>
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| admin | 17a890d | 2006-09-27 20:42:42 +0000 | [diff] [blame] | 10 | <script type="text/javascript" src="../nav/nav.js"></script>
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| admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 13 | <script type="text/javascript">
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| 24 | <meta name='author' content='Rick Ellis' />
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| 25 | <meta name='description' content='Code Igniter User Guide' />
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| 27 | </head>
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| 28 | <body>
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| 30 | <!-- START NAVIGATION -->
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| 31 | <div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
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| 32 | <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>
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| 33 | <div id="masthead">
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| 34 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%">
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| 35 | <tr>
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| admin | e0cd609 | 2006-10-20 01:00:31 +0000 | [diff] [blame^] | 36 | <td><h1>Code Igniter User Guide Version 1.5.0b3</h1></td>
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| admin | 0a69734 | 2006-10-11 19:40:55 +0000 | [diff] [blame] | 37 | <td id="breadcrumb_right"><a href="../toc.html">Linear Table of Contents</a></td>
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| admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 38 | </tr>
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| 39 | </table>
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| 40 | </div>
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| 41 | <!-- END NAVIGATION -->
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| 42 |
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| 43 |
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| 44 | <!-- START BREADCRUMB -->
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| 45 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%">
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| 46 | <tr>
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| 47 | <td id="breadcrumb">
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| 48 | <a href="http://www.codeigniter.com/">Code Igniter Home</a> ›
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| 49 | <a href="../index.html">User Guide Home</a> ›
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| 50 | Array Helper
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| 51 | </td>
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| 52 | <td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="www.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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| 53 | </tr>
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| 55 | <!-- END BREADCRUMB -->
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| 56 |
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| 57 | <br clear="all" />
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| 58 |
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| 59 |
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| 60 | <!-- START CONTENT -->
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| 61 | <div id="content">
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| 62 |
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| 63 |
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| 64 | <h1>Array Helper</h1>
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| 65 |
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| 66 | <p>The Array Helper file contains functions that assist in working with arrays.</p>
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| 67 |
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| 68 |
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| 69 | <h2>Loading this Helper</h2>
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| 70 |
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| 71 | <p>This helper is loaded using the following code:</p>
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| 72 | <code>$this->load->helper('array');</code>
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| 73 |
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| 74 | <p>The following functions are available:</p>
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| 75 |
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| admin | e348efb | 2006-09-20 21:13:26 +0000 | [diff] [blame] | 76 | <h2>element()</h2>
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| 77 |
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| 78 | <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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| 79 | a value exists it is returned. If a value does not exist it returns FALSE, or whater you've specified as the default value via the third parameter. Example:</p>
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| 80 |
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| 81 | <code>
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| 82 | $array = array('color' => 'red', 'shape' => 'round', 'size' => '');<br />
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| 83 | <br />
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| 84 | // returns "red"<br />
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| 85 | echo element('color', $array);<br />
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| 86 | <br />
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| 87 | // returns NULL<br />
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| 88 | echo element('size', $array, NULL);
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| 89 | </code>
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| 90 |
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| admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 91 |
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| 92 | <h2>random_element()</h2>
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| 93 |
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| 94 | <p>Takes an array as input and returns a random element from it. Usage example:</p>
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| 95 |
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| 96 | <code>$quotes = array(<br />
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| 97 | "I find that the harder I work, the more luck I seem to have. - Thomas Jefferson",<br />
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| 98 | "Don't stay in bed, unless you can make money in bed. - George Burns",<br />
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| 99 | "We didn't lose the game; we just ran out of time. - Vince Lombardi",<br />
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| 100 | "If everything seems under control, you're not going fast enough. - Mario Andretti",<br />
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| 101 | "Reality is merely an illusion, albeit a very persistent one. - Albert Einstein",<br />
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| 102 | "Chance favors the prepared mind - Louis Pasteur"<br />
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| 103 | );<br />
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| 104 | <br />
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| 105 | echo random_element($quotes);</code>
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| 106 |
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| 107 |
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| 108 |
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| 109 |
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| 110 | </div>
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| 111 | <!-- END CONTENT -->
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| 112 |
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| 113 |
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| 114 | <div id="footer">
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| 115 | <p>
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| 116 | Previous Topic: <a href="../libraries/xmlrpc.html">XML-RPC Class</a>
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| 117 | ·
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| 118 | <a href="#top">Top of Page</a> ·
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| 119 | <a href="../index.html">User Guide Home</a> ·
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| 120 | Next Topic: <a href="cookie_helper.html">Cookie Helper</a>
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| 121 | <p>
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| 122 | <p><a href="http://www.codeigniter.com">Code Igniter</a> · Copyright © 2006 · <a href="http://www.pmachine.com">pMachine, Inc.</a></p>
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