diff options
| author | Joël Cox <joel@joelcox.nl> | 2011-10-09 18:39:39 +0200 |
|---|---|---|
| committer | Joël Cox <joel@joelcox.nl> | 2011-10-09 18:39:39 +0200 |
| commit | f4fb1db458fab52d0493ead52c9ea7e01206eaa7 (patch) | |
| tree | c549600f342f4d3f0df75a2f2f7c265be0f1cc72 /user_guide/helpers/array_helper.html | |
| parent | c4dd200c1155a118afa32cd91d9bd67bc243f83a (diff) | |
Moved tutorial to new user guide directory.
Diffstat (limited to 'user_guide/helpers/array_helper.html')
| -rw-r--r-- | user_guide/helpers/array_helper.html | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/user_guide/helpers/array_helper.html b/user_guide/helpers/array_helper.html deleted file mode 100644 index 956c54e8f..000000000 --- a/user_guide/helpers/array_helper.html +++ /dev/null @@ -1,170 +0,0 @@ -<!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> - -<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> -<title>Array Helper : CodeIgniter User Guide</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='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_darker.jpg" width="154" height="43" 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 2.0.3</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($quotes);</code> - - -<h2>elements()</h2> - -<p>Lets you fetch a number of items from an array. The function tests whether each of the array indices is set. If an index does not exist -it is set to FALSE, or whatever you've specified as the default value via the third parameter. Example:</p> - -<code> -$array = array(<br /> - 'color' => 'red',<br /> - 'shape' => 'round',<br /> - 'radius' => '10',<br /> - 'diameter' => '20'<br /> -);<br /> -<br /> -$my_shape = elements(array('color', 'shape', 'height'), $array);<br /> -</code> - -<p>The above will return the following array:</p> - -<code> -array(<br /> - 'color' => 'red',<br /> - 'shape' => 'round',<br /> - 'height' => FALSE<br /> -); -</code> - -<p>You can set the third parameter to any default value you like:</p> - -<code> -$my_shape = elements(array('color', 'shape', 'height'), $array, NULL);<br /> -</code> - -<p>The above will return the following array:</p> - -<code> -array(<br /> - 'color' => 'red',<br /> - 'shape' => 'round',<br /> - 'height' => NULL<br /> -); -</code> - -<p>This is useful when sending the <kbd>$_POST</kbd> array to one of your Models. This prevents users from -sending additional POST data to be entered into your tables:</p> - -<code> -$this->load->model('post_model');<br /> -<br /> -$this->post_model->update(elements(array('id', 'title', 'content'), $_POST)); -</code> - -<p>This ensures that only the id, title and content fields are sent to be updated.</p> - -</div> -<!-- END CONTENT --> - - -<div id="footer"> -<p> -Previous Topic: <a href="../libraries/javascript.html">Javascript Class</a> · -<a href="#top">Top of Page</a> · -<a href="../index.html">User Guide Home</a> · -Next Topic: <a href="captcha_helper.html">CAPTCHA Helper</a></p> -<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2011 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p> -</div> - -</body> -</html>
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