| 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">
|
| 2 | <html>
|
| 3 | <head>
|
| 4 |
|
| 5 | <title>Code Igniter User Guide</title>
|
| 6 |
|
| 7 | <style type='text/css' media='all'>@import url('../../userguide.css');</style>
|
| 8 | <link rel='stylesheet' type='text/css' media='all' href='../../userguide.css' />
|
| 9 |
|
| 10 | <script type="text/javascript" src="../../scripts/nav.js"></script>
|
| 11 | <script type="text/javascript" src="../../scripts/prototype.lite.js"></script>
|
| 12 | <script type="text/javascript" src="../../scripts/moo.fx.js"></script>
|
| 13 | <script type="text/javascript">
|
| 14 | window.onload = function() {
|
| 15 | myHeight = new fx.Height('nav', {duration: 400});
|
| 16 | myHeight.hide();
|
| 17 | }
|
| 18 | </script>
|
| 19 |
|
| 20 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
| 21 | <meta http-equiv='expires' content='-1' />
|
| 22 | <meta http-equiv= 'pragma' content='no-cache' />
|
| 23 | <meta name='robots' content='all' />
|
| 24 | <meta name='author' content='Rick Ellis' />
|
| 25 | <meta name='description' content='Code Igniter User Guide' />
|
| 26 |
|
| 27 | </head>
|
| 28 | <body>
|
| 29 |
|
| 30 | <!-- START NAVIGATION -->
|
| 31 | <div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../../');</script></div></div>
|
| 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>
|
| 33 | <div id="masthead">
|
| 34 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
| 35 | <tr>
|
| admin | 9fc347d | 2006-09-21 00:00:28 +0000 | [diff] [blame] | 36 | <td><h1>Code Igniter User Guide Version 1.4.1</h1></td>
|
| admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 37 | <td id="breadcrumb_right"><a href="../../toc.html">Full Table of Contents</a></td>
|
| 38 | </tr>
|
| 39 | </table>
|
| 40 | </div>
|
| 41 | <!-- END NAVIGATION -->
|
| 42 |
|
| 43 | <!-- START BREADCRUMB -->
|
| 44 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
| 45 | <tr>
|
| 46 | <td id="breadcrumb">
|
| 47 | <a href="http://www.codeigniter.com/">Code Igniter Home</a> ›
|
| 48 | <a href="../../index.html">User Guide Home</a> ›
|
| 49 | <a href="index.html">Database Library</a> ›
|
| 50 | Field Names
|
| 51 | </td>
|
| 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>
|
| 53 | </tr>
|
| 54 | </table>
|
| 55 | <!-- END BREADCRUMB -->
|
| 56 |
|
| 57 |
|
| 58 | <br clear="all" />
|
| 59 |
|
| 60 |
|
| 61 | <!-- START CONTENT -->
|
| 62 | <div id="content">
|
| 63 |
|
| 64 |
|
| 65 | <h1>Field Data</h1>
|
| 66 |
|
| 67 |
|
| 68 | <h2>Retrieving Field Names</h2>
|
| 69 | <p>Sometimes it's helpful to gather the field names.</p>
|
| 70 |
|
| 71 | <h2>$this->db->field_names();</h2>
|
| 72 | <p>Returns an array containing the field names. You must supply the table name to the function:</p>
|
| 73 |
|
| 74 | <code>
|
| 75 | $fields = $this->db->field_names('table_name');<br /><br />
|
| 76 |
|
| 77 | foreach ($fields as $field)<br />
|
| 78 | {<br />
|
| 79 | echo $field;<br />
|
| 80 | }
|
| 81 | </code>
|
| 82 |
|
| 83 |
|
| 84 |
|
| 85 | <h2>Retrieving Field MetaData</h2>
|
| 86 | <p>Sometimes it's helpful to gather the field names or other metadata, like the column type, max length, etc.</p>
|
| 87 |
|
| 88 | <h2>$this->db->field_data();</h2>
|
| 89 | <p>Returns an array of objects containing field information.</p>
|
| 90 |
|
| 91 | <p class="important">Note: Not all databases provide meta-data.</p>
|
| 92 |
|
| 93 | <p>Usage example:</p>
|
| 94 |
|
| 95 | <code>
|
| 96 | $fields = $this->db->field_data('table_name');<br /><br />
|
| 97 |
|
| 98 | foreach ($fields as $field)<br />
|
| 99 | {<br />
|
| 100 | echo $field->name;<br />
|
| 101 | echo $field->type;<br />
|
| 102 | echo $field->max_length;<br />
|
| 103 | echo $field->primary_key;<br />
|
| 104 | }
|
| 105 | </code>
|
| 106 |
|
| 107 | <p>If you have run a query already you can use the result oject instead of supplying the table name:</p>
|
| 108 |
|
| 109 | <code>
|
| 110 | $query = $this->db->query("YOUR QUERY");<br />
|
| 111 | $fields = $query->field_data();
|
| 112 | </code>
|
| 113 |
|
| 114 |
|
| 115 | <p>The following data is available from this function if supported by your database:</p>
|
| 116 |
|
| 117 | <ul>
|
| 118 | <li>name - column name</li>
|
| 119 | <li>max_length - maximum length of the column</li>
|
| 120 | <li>primary_key - 1 if the column is a primary key</li>
|
| 121 | <li>type - the type of the column</li>
|
| 122 | </ul>
|
| 123 |
|
| 124 |
|
| 125 |
|
| 126 |
|
| 127 |
|
| 128 | </div>
|
| 129 | <!-- END CONTENT -->
|
| 130 |
|
| 131 |
|
| 132 | <div id="footer">
|
| 133 | <p>
|
| 134 | Previous Topic: <a href="results.html">Query Results</a>
|
| 135 | ·
|
| 136 | <a href="#top">Top of Page</a> ·
|
| 137 | <a href="../../index.html">User Guide Home</a> ·
|
| 138 | Next Topic: <a href="table_data.html">Table MetaData</a>
|
| 139 | <p>
|
| 140 | <p><a href="http://www.codeigniter.com">Code Igniter</a> · Copyright © 2006 · <a href="http://www.pmachine.com">pMachine, Inc.</a></p>
|
| 141 | </div>
|
| 142 |
|
| 143 | </body>
|
| 144 | </html> |