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| Derek Jones | 8917af7 | 2010-03-05 12:41:45 -0600 | [diff] [blame] | 31 | <td><h1>CodeIgniter User Guide Version 2.0.0</h1></td> |
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| 59 | <h1>Array Helper</h1> |
| 60 | |
| 61 | <p>The Array Helper file contains functions that assist in working with arrays.</p> |
| 62 | |
| 63 | |
| 64 | <h2>Loading this Helper</h2> |
| 65 | |
| 66 | <p>This helper is loaded using the following code:</p> |
| 67 | <code>$this->load->helper('array');</code> |
| 68 | |
| 69 | <p>The following functions are available:</p> |
| 70 | |
| 71 | <h2>element()</h2> |
| 72 | |
| 73 | <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 |
| 74 | 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> |
| 75 | |
| 76 | <code> |
| 77 | $array = array('color' => 'red', 'shape' => 'round', 'size' => '');<br /> |
| 78 | <br /> |
| 79 | // returns "red"<br /> |
| 80 | echo element('color', $array);<br /> |
| 81 | <br /> |
| 82 | // returns NULL<br /> |
| 83 | echo element('size', $array, NULL); |
| 84 | </code> |
| 85 | |
| 86 | |
| 87 | <h2>random_element()</h2> |
| 88 | |
| 89 | <p>Takes an array as input and returns a random element from it. Usage example:</p> |
| 90 | |
| 91 | <code>$quotes = array(<br /> |
| 92 | "I find that the harder I work, the more luck I seem to have. - Thomas Jefferson",<br /> |
| 93 | "Don't stay in bed, unless you can make money in bed. - George Burns",<br /> |
| 94 | "We didn't lose the game; we just ran out of time. - Vince Lombardi",<br /> |
| 95 | "If everything seems under control, you're not going fast enough. - Mario Andretti",<br /> |
| 96 | "Reality is merely an illusion, albeit a very persistent one. - Albert Einstein",<br /> |
| 97 | "Chance favors the prepared mind - Louis Pasteur"<br /> |
| 98 | );<br /> |
| 99 | <br /> |
| 100 | echo random_element($quotes);</code> |
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| Derek Jones | d6d70e3 | 2010-03-29 10:10:27 -0500 | [diff] [blame] | 115 | <p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2010 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p> |
| Derek Allard | 2067d1a | 2008-11-13 22:59:24 +0000 | [diff] [blame] | 116 | </div> |
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