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authorMike Funk <mfunk@xulonpress.com>2011-10-10 16:31:56 +0200
committerMike Funk <mfunk@xulonpress.com>2011-10-10 16:31:56 +0200
commit8afb848fded8fbdfa24b72df7f067e960c83c0e8 (patch)
treebf3d8fa70610253cb13a87c1aa9d634dcee9f413 /user_guide/database/examples.html
parent25246b6b29d87ad7a4f304a7b5623c9f57953356 (diff)
parentbdbe6d222c15e9d1b42a8ee3a3e7fe04b753c1ba (diff)
Codeigniter develop latest.
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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 xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
-<head>
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-<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<title>Database Quick Start : 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' />
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-<meta name='description' content='CodeIgniter User Guide' />
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-<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
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-<div id="masthead">
-<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
-<tr>
-<td><h1>CodeIgniter User Guide Version 2.0.3</h1></td>
-<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
-</tr>
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-</div>
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-<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
-<tr>
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-<a href="http://codeigniter.com/">CodeIgniter 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;
-Database Example Code
-</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&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>
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-
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-<br clear="all" />
-
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-<!-- START CONTENT -->
-<div id="content">
-
-
-<h1>Database Quick Start: Example Code</h1>
-
-<p>The following page contains example code showing how the database class is used. For complete details please
-read the individual pages describing each function.</p>
-
-
-<h2>Initializing the Database Class</h2>
-
-<p>The following code loads and initializes the database class based on your <a href="configuration.html">configuration</a> settings:</p>
-
-<code>$this->load->database();</code>
-
-<p>Once loaded the class is ready to be used as described below.</p>
-
-<p>Note: If all your pages require database access you can connect automatically. See the <a href="connecting.html">connecting</a> page for details.</p>
-
-
-<h2>Standard Query With Multiple Results (Object Version)</h2>
-
-<code>$query = $this->db->query('SELECT name, title, email FROM my_table');<br />
-<br />
-foreach ($query->result() as $row)<br />
-{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo $row->title;<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo $row->name;<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo $row->email;<br />
-}<br />
-<br />
-echo 'Total Results: ' . $query->num_rows();
-</code>
-
-<p>The above <dfn>result()</dfn> function returns an array of <strong>objects</strong>. Example: $row->title</p>
-
-
-<h2>Standard Query With Multiple Results (Array Version)</h2>
-
-<code>$query = $this->db->query('SELECT name, title, email FROM my_table');<br />
-<br />
-foreach ($query->result_array() as $row)<br />
-{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo $row['title'];<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo $row['name'];<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo $row['email'];<br />
-}</code>
-
-<p>The above <dfn>result_array()</dfn> function returns an array of standard array indexes. Example: $row['title']</p>
-
-
-<h2>Testing for Results</h2>
-
-<p>If you run queries that might <strong>not</strong> produce a result, you are encouraged to test for a result first
-using the <dfn>num_rows()</dfn> function:</p>
-
-<code>
-$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 $row->body;<br />
-&nbsp;&nbsp;&nbsp;}<br />
-}
-</code>
-
-
-
-
-<h2>Standard Query With Single Result</h2>
-
-<code>$query = $this->db->query('SELECT name FROM my_table LIMIT 1');<br />
-<br />
-$row = $query->row();<br />
-echo $row->name;<br />
-</code>
-
-<p>The above <dfn>row()</dfn> function returns an <strong>object</strong>. Example: $row->name</p>
-
-
-<h2>Standard Query With Single Result (Array version)</h2>
-
-<code>$query = $this->db->query('SELECT name FROM my_table LIMIT 1');<br />
-<br />
-$row = $query->row_array();<br />
-echo $row['name'];<br />
-</code>
-
-<p>The above <dfn>row_array()</dfn> function returns an <strong>array</strong>. Example: $row['name']</p>
-
-
-<h2>Standard Insert</h2>
-
-<code>
-$sql = "INSERT INTO mytable (title, name) <br />
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;VALUES (".$this->db->escape($title).", ".$this->db->escape($name).")";<br />
-<br />
-$this->db->query($sql);<br />
-<br />
-echo $this->db->affected_rows();
-</code>
-
-
-
-
-<h2>Active Record Query</h2>
-
-<p>The <a href="active_record.html">Active Record Pattern</a> gives you a simplified means of retrieving data:</p>
-
-<code>
-$query = $this->db->get('table_name');<br />
-<br />
-foreach ($query->result() as $row)<br />
-{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo $row->title;<br />
-}</code>
-
-<p>The above <dfn>get()</dfn> function retrieves all the results from the supplied table.
-The <a href="active_record.html">Active Record</a> class contains a full compliment of functions
-for working with data.</p>
-
-
-<h2>Active Record Insert</h2>
-
-<code>
-$data = array(<br />
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'title' => $title,<br />
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'name' => $name,<br />
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'date' => $date<br />
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;);<br />
-<br />
-$this->db->insert('mytable', $data);
-<br /><br />
-// Produces: INSERT INTO mytable (title, name, date) VALUES ('{$title}', '{$name}', '{$date}')</code>
-
-
-
-
-</div>
-<!-- END CONTENT -->
-
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-<div id="footer">
-<p>
-Previous Topic:&nbsp;&nbsp;<a href="index.html">Database Class</a>
-&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
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-<a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
-Next Topic:&nbsp;&nbsp;<a href="configuration.html">Database Configuration</a>
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