diff options
Diffstat (limited to 'user_guide/database/fields.html')
| -rw-r--r-- | user_guide/database/fields.html | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/user_guide/database/fields.html b/user_guide/database/fields.html deleted file mode 100644 index 9cef9a58e..000000000 --- a/user_guide/database/fields.html +++ /dev/null @@ -1,163 +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>Field Data : 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 2.1.2</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> › -<a href="index.html">Database Library</a> › -Field Names -</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>Field Data</h1> - - -<h2>$this->db->list_fields()</h2> -<p>Returns an array containing the field names. This query can be called two ways:</p> - - -<p>1. You can supply the table name and call it from the <dfn>$this->db-></dfn> object:</p> - -<code> -$fields = $this->db->list_fields('table_name');<br /><br /> - -foreach ($fields as $field)<br /> -{<br /> - echo $field;<br /> -} -</code> - -<p>2. You can gather the field names associated with any query you run by calling the function -from your query result object:</p> - -<code> -$query = $this->db->query('SELECT * FROM some_table'); -<br /><br /> - -foreach ($query->list_fields() as $field)<br /> -{<br /> - echo $field;<br /> -} -</code> - - -<h2>$this->db->field_exists()</h2> - -<p>Sometimes it's helpful to know whether a particular field exists before performing an action. -Returns a boolean TRUE/FALSE. Usage example:</p> - -<code> -if ($this->db->field_exists('field_name', 'table_name'))<br /> -{<br /> - // some code...<br /> -} -</code> - -<p>Note: Replace <em>field_name</em> with the name of the column you are looking for, and replace -<em>table_name</em> with the name of the table you are looking for.</p> - - -<h2>$this->db->field_data()</h2> -<p>Returns an array of objects containing field information.</p> -<p>Sometimes it's helpful to gather the field names or other metadata, like the column type, max length, etc.</p> - - -<p class="important">Note: Not all databases provide meta-data.</p> - -<p>Usage example:</p> - -<code> -$fields = $this->db->field_data('table_name');<br /><br /> - -foreach ($fields as $field)<br /> -{<br /> - echo $field->name;<br /> - echo $field->type;<br /> - echo $field->max_length;<br /> - echo $field->primary_key;<br /> -} -</code> - -<p>If you have run a query already you can use the result object instead of supplying the table name:</p> - -<code> -$query = $this->db->query("YOUR QUERY");<br /> -$fields = $query->field_data(); -</code> - - -<p>The following data is available from this function if supported by your database:</p> - -<ul> -<li>name - column name</li> -<li>max_length - maximum length of the column</li> -<li>primary_key - 1 if the column is a primary key</li> -<li>type - the type of the column</li> -</ul> - - -</div> -<!-- END CONTENT --> - - -<div id="footer"> -<p> -Previous Topic: <a href="table_data.html"> Table Data</a> - · -<a href="#top">Top of Page</a> · -<a href="../index.html">User Guide Home</a> · -Next Topic: <a href="call_function.html">Custom Function Calls</a> -</p> -<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p> -</div> - -</body> -</html>
\ No newline at end of file |