<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>CodeIgniter User Guide : Array Helper</title> <style type='text/css' media='all'>@import url('../userguide.css');</style> <link rel='stylesheet' type='text/css' media='all' href='../userguide.css' /> <script type="text/javascript" src="../nav/nav.js"></script> <script type="text/javascript" src="../nav/prototype.lite.js"></script> <script type="text/javascript" src="../nav/moo.fx.js"></script> <script type="text/javascript" src="../nav/user_guide_menu.js"></script> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv='expires' content='-1' /> <meta http-equiv= 'pragma' content='no-cache' /> <meta name='robots' content='all' /> <meta name='author' content='ExpressionEngine Dev Team' /> <meta name='description' content='CodeIgniter User Guide' /> </head> <body> <!-- START NAVIGATION --> <div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div> <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> <div id="masthead"> <table cellpadding="0" cellspacing="0" border="0" style="width:100%"> <tr> <td><h1>CodeIgniter User Guide Version 1.6.0</h1></td> <td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td> </tr> </table> </div> <!-- END NAVIGATION --> <!-- START BREADCRUMB --> <table cellpadding="0" cellspacing="0" border="0" style="width:100%"> <tr> <td id="breadcrumb"> <a href="http://codeigniter.com/">CodeIgniter Home</a> › <a href="../index.html">User Guide Home</a> › Array Helper </td> <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> </tr> </table> <!-- END BREADCRUMB --> <br clear="all" /> <!-- START CONTENT --> <div id="content"> <h1>Array Helper</h1> <p>The Array Helper file contains functions that assist in working with arrays.</p> <h2>Loading this Helper</h2> <p>This helper is loaded using the following code:</p> <code>$this->load->helper('array');</code> <p>The following functions are available:</p> <h2>element()</h2> <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 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> <code> $array = array('color' => 'red', 'shape' => 'round', 'size' => '');<br /> <br /> // returns "red"<br /> echo element('color', $array);<br /> <br /> // returns NULL<br /> echo element('size', $array, NULL); </code> <h2>random_element()</h2> <p>Takes an array as input and returns a random element from it. Usage example:</p> <code>$quotes = array(<br /> "I find that the harder I work, the more luck I seem to have. - Thomas Jefferson",<br /> "Don't stay in bed, unless you can make money in bed. - George Burns",<br /> "We didn't lose the game; we just ran out of time. - Vince Lombardi",<br /> "If everything seems under control, you're not going fast enough. - Mario Andretti",<br /> "Reality is merely an illusion, albeit a very persistent one. - Albert Einstein",<br /> "Chance favors the prepared mind - Louis Pasteur"<br /> );<br /> <br /> echo random_element($quotes);</code> </div> <!-- END CONTENT --> <div id="footer"> <p> Previous Topic: <a href="../libraries/zip.html">Zip Encoding Class</a> · <a href="#top">Top of Page</a> · <a href="../index.html">User Guide Home</a> · Next Topic: <a href="cookie_helper.html">Cookie Helper</a> </p> <p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2007 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p> </div> </body> </html>