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authoradmin <devnull@localhost>2006-09-24 19:59:33 +0200
committeradmin <devnull@localhost>2006-09-24 19:59:33 +0200
commitfb28bb8d3bb01993e83126be028a1dda43422a39 (patch)
tree874dda70bb048a55fa2783a1f1e3cfeea66f26f7 /user_guide/database/results.html
parent5808346898ec9c602893fc54540958a8c556be29 (diff)
Adding database folder
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html>
+<head>
+
+<title>Code Igniter 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="../scripts/nav.js"></script>
+<script type="text/javascript" src="../scripts/prototype.lite.js"></script>
+<script type="text/javascript" src="../scripts/moo.fx.js"></script>
+<script type="text/javascript">
+window.onload = function() {
+ myHeight = new fx.Height('nav', {duration: 400});
+ myHeight.hide();
+}
+</script>
+
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+<meta http-equiv='expires' content='-1' />
+<meta http-equiv= 'pragma' content='no-cache' />
+<meta name='robots' content='all' />
+<meta name='author' content='Rick Ellis' />
+<meta name='description' content='Code Igniter 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.jpg" width="153" height="44" 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>Code Igniter User Guide Version 1.4.1</h1></td>
+<td id="breadcrumb_right"><a href="../toc.html">Full Table of Contents</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://www.codeigniter.com/">Code Igniter Home</a> &nbsp;&#8250;&nbsp;
+<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
+<a href="index.html">Database Library</a> &nbsp;&#8250;&nbsp;
+Query Results
+</td>
+<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&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
+</tr>
+</table>
+<!-- END BREADCRUMB -->
+
+
+<br clear="all" />
+
+
+<!-- START CONTENT -->
+<div id="content">
+
+
+
+<h1>Generating Query Results</h1>
+
+
+<p>There are several ways to generate query results:</p>
+
+ <h2>result()</h2>
+
+ <p>This function returns the query result as an array of <strong>objects</strong>, or <strong>FALSE</strong> on failure.
+
+ Typically you'll use this in a foreach loop, like this:</p>
+
+ <code>
+ $query = $this->db->query("YOUR QUERY");<br />
+ <br />
+ foreach ($query->result() as $row)<br />
+ {<br />
+ &nbsp;&nbsp;&nbsp;echo $row->title;<br />
+ &nbsp;&nbsp;&nbsp;echo $row->name;<br />
+ &nbsp;&nbsp;&nbsp;echo $row->body;<br />
+ }</code>
+
+ <p>If you run queries that might <strong>not</strong> produce a result, you are encouraged to test the result first:</p>
+
+ <code>
+ $query = $this->db->query("YOUR QUERY");<br />
+ <br />
+ if ($query->num_rows() > 0)<br />
+ {<br />
+ &nbsp;&nbsp;&nbsp;foreach ($query->result() as $row)<br />
+ &nbsp;&nbsp;&nbsp;{<br />
+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo $row->title;<br />
+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo $row->name;<br />
+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo $row->body;<br />
+ &nbsp;&nbsp;&nbsp;}<br />
+ }
+ </code>
+
+ <h2>result_array()</h2>
+
+ <p>This function returns the query result as a pure array, or FALSE on failure. Typically you'll use this in a foreach loop, like this:</p>
+ <code>
+ $query = $this->db->query("YOUR QUERY");<br />
+ <br />
+ foreach ($query->result_array() as $row)<br />
+ {<br />
+ &nbsp;&nbsp;&nbsp;echo $row['title'];<br />
+ &nbsp;&nbsp;&nbsp;echo $row['name'];<br />
+ &nbsp;&nbsp;&nbsp;echo $row['body'];<br />
+ }</code>
+
+ <h2>result('array')</h2>
+
+ <p>Identical to <dfn>$this->db->result_array()</dfn>.</p>
+
+
+ <h2>row()</h2>
+
+ <p>This function returns a single result row. If your query has more than one row, it returns only the first row.
+ The result is returned as an <strong>object</strong>. Here's a usage example:</p>
+ <code>
+ $query = $this->db->query("YOUR QUERY");<br />
+ <br />
+ if ($query->num_rows() > 0)<br />
+ {<br />
+ &nbsp;&nbsp;&nbsp;$row = $query->row();
+ <br /><br />
+ &nbsp;&nbsp;&nbsp;echo $row->title;<br />
+ &nbsp;&nbsp;&nbsp;echo $row->name;<br />
+ &nbsp;&nbsp;&nbsp;echo $row->body;<br />
+ }
+ </code>
+
+ <p>If you want a specific row returned you can submit the row number as a digit in the first parameter:
+
+ <code>$row = $query->row(<dfn>5</dfn>);</code>
+
+
+ <h2>row_array()</h2>
+
+ <p>Identical to the above <var>row()</var> function, except it returns an array. Example:</p>
+
+ <code>
+ $query = $this->db->query("YOUR QUERY");<br />
+ <br />
+ if ($query->num_rows() > 0)<br />
+ {<br />
+ &nbsp;&nbsp;&nbsp;$row = $query->row_array();
+ <br /><br />
+ &nbsp;&nbsp;&nbsp;echo $row['title'];<br />
+ &nbsp;&nbsp;&nbsp;echo $row['name'];<br />
+ &nbsp;&nbsp;&nbsp;echo $row['body'];<br />
+ }
+ </code>
+
+
+ <p>If you want a specific row returned you can submit the row number as a digit in the first parameter:
+
+ <code>$row = $query->row_array(<dfn>5</dfn>);</code>
+
+
+ <p>In addition, you can walk forward/backwards/first/last through your results using these variations:</p>
+
+<p>
+ <strong>$row = $query->first_row()</strong><br />
+ <strong>$row = $query->last_row()</strong><br />
+ <strong>$row = $query->next_row()</strong><br />
+ <strong>$row = $query->previous_row()</strong>
+</p>
+
+<p>By default they return an object unless you put the word "array" in the parameter:</p>
+
+<p>
+ <strong>$row = $query->first_row('array')</strong><br />
+ <strong>$row = $query->last_row('array')</strong><br />
+ <strong>$row = $query->next_row('array')</strong><br />
+ <strong>$row = $query->previous_row('array')</strong>
+</p>
+
+
+
+<h1><br />Result Helper Functions</h1>
+
+
+<h2>$query->num_rows()</h2>
+<p>The number of rows returned by the query. Note: In this example, <dfn>$query</dfn> is the variable that the query result object is assigned to:</p>
+
+<code>$query = $this->db->query('SELECT * FROM my_table');<br /><br />
+echo $query->num_rows();
+</code>
+
+<h2>$query->num_fields()</h2>
+<p>The number of FIELDS (columns) returned by the query. Make sure to call the function using your query result object:</p>
+
+<code>$query = $this->db->query('SELECT * FROM my_table');<br /><br />
+echo $query->num_fields();
+</code>
+
+
+
+
+
+</div>
+<!-- END CONTENT -->
+
+
+<div id="footer">
+<p>
+Previous Topic:&nbsp;&nbsp;<a href="queries.html">Queries</a>
+&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+<a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+<a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+Next Topic:&nbsp;&nbsp;<a href="helpers.html">Query Helper Functions</a>
+<p>
+<p><a href="http://www.codeigniter.com">Code Igniter</a> &nbsp;&middot;&nbsp; Copyright &#169; 2006 &nbsp;&middot;&nbsp; <a href="http://www.pmachine.com">pMachine, Inc.</a></p>
+</div>
+
+</body>
+</html> \ No newline at end of file