diff options
Diffstat (limited to 'user_guide/database/fields.html')
| -rw-r--r-- | user_guide/database/fields.html | 324 |
1 files changed, 162 insertions, 162 deletions
diff --git a/user_guide/database/fields.html b/user_guide/database/fields.html index ed8f63d63..067d5b69c 100644 --- a/user_guide/database/fields.html +++ b/user_guide/database/fields.html @@ -1,163 +1,163 @@ -<!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 1.7</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 © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
-</div>
-
-</body>
+<!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 1.7</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 © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p> +</div> + +</body> </html>
\ No newline at end of file |