| admin | fb28bb8 | 2006-09-24 17:59:33 +0000 | [diff] [blame] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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| 5 | <title>Code Igniter User Guide</title>
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| 24 | <meta name='author' content='Rick Ellis' />
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| 25 | <meta name='description' content='Code Igniter User Guide' />
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| 27 | </head>
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| 28 | <body>
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| 30 | <!-- START NAVIGATION -->
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| 31 | <div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
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| 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>
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| 33 | <div id="masthead">
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| 34 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%">
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| 35 | <tr>
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| 36 | <td><h1>Code Igniter User Guide Version 1.4.1</h1></td>
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| 37 | <td id="breadcrumb_right"><a href="../toc.html">Full Table of Contents</a></td>
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| 38 | </tr>
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| 39 | </table>
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| 40 | </div>
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| 41 | <!-- END NAVIGATION -->
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| 42 |
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| 43 |
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| 44 |
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| 45 | <!-- START BREADCRUMB -->
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| 46 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%">
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| 47 | <tr>
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| 48 | <td id="breadcrumb">
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| 49 | <a href="http://www.codeigniter.com/">Code Igniter Home</a> ›
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| 50 | <a href="../index.html">User Guide Home</a> ›
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| 51 | <a href="index.html">Database Library</a> ›
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| 52 | Database Example Code
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| 53 | </td>
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| 54 | <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>
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| 55 | </tr>
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| 56 | </table>
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| 58 |
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| 59 |
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| 60 | <br clear="all" />
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| 61 |
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| 62 |
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| 63 | <!-- START CONTENT -->
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| 64 | <div id="content">
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| 65 |
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| 66 |
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| 67 | <h1>Database Quick Start: Example Code</h1>
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| 68 |
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| 69 | <p>The following page contains example code showing how the database class is used. For complete details please
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| 70 | read the individual pages describing each function.</p>
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| 71 |
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| 72 |
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| 73 | <h2>Initializing the Database Class</h2>
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| 74 |
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| 75 | <p>The following code loads and initializes the database class based on your <a href="configuration.html">configuration</a> settings:</p>
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| 76 |
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| 77 | <code>$this->load->database();</code>
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| 78 |
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| 79 | <p>Once loaded the class is ready to be used as described below.</p>
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| 80 |
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| 81 | <p>Note: If all your pages require database access you can connect automatically. See the <a href="connecting.html">connecting</a> page for details.</p>
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| 82 |
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| 83 |
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| 84 | <h2>Standard Query With Multiple Results (Object Version)</h2>
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| 85 |
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| 86 | <code>$query = $this->db->query('SELECT name, title, email FROM my_table');<br />
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| 87 | <br />
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| 88 | foreach ($query->result() as $row)<br />
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| 89 | {<br />
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| 90 | echo $row->title;<br />
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| 91 | echo $row->name;<br />
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| 92 | echo $row->email;<br />
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| 93 | }<br />
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| 94 | <br />
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| 95 | echo 'Total Results: ' . $query->num_rows();
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| 96 | </code>
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| 97 |
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| 98 | <p>The above <dfn>result()</dfn> function returns an array of <strong>objects</strong>. Example: $row->title</p>
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| 99 |
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| 100 |
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| 101 | <h2>Standard Query With Multiple Results (Array Version)</h2>
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| 102 |
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| 103 | <code>$query = $this->db->query('SELECT name, title, email FROM my_table');<br />
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| 104 | <br />
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| 105 | foreach ($query->result_array() as $row)<br />
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| 106 | {<br />
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| 107 | echo $row['title'];<br />
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| 108 | echo $row['name'];<br />
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| 109 | echo $row['email'];<br />
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| 110 | }</code>
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| 111 |
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| 112 | <p>The above <dfn>result_array()</dfn> function returns an array of standard array indexes. Example: $row['title']</p>
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| 113 |
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| 114 |
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| 115 | <h2>Standard Query With Single Result</h2>
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| 116 |
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| 117 | <code>$query = $this->db->query('SELECT name FROM my_table LIMIT 1');<br />
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| 118 | <br />
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| 119 | $row = $query->row();<br />
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| 120 | echo $row->name;<br />
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| 121 | </code>
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| 122 |
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| 123 |
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| 124 | <h2>Standard Insert</h2>
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| 125 |
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| 126 | <code>
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| 127 | $sql = "INSERT INTO mytable (title, name) <br />
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| 128 | VALUES (".$this->db->escape($title).", ".$this->db->escape($name).")";<br />
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| 129 | <br />
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| 130 | $this->db->query($sql);<br />
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| 131 | <br />
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| 132 | echo $this->db->affected_rows();
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| 133 | </code>
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| 134 |
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| 135 |
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| 136 |
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| 137 |
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| 138 | <h2>Active Record Query</h2>
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| 139 |
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| 140 | <p>The <a href="active_record.html">Active Record Pattern</a> gives you a simplified means of retrieving data:</p>
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| 141 |
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| 142 | <code>
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| 143 | $query = $this->db->get('table_name');<br />
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| 144 | <br />
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| 145 | foreach ($query->result() as $row)<br />
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| 146 | {<br />
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| 147 | echo $row->title;<br />
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| 148 | }</code>
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| 149 |
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| 150 |
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| 151 | <h2>Active Record Insert</h2>
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| 152 |
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| 153 | <code>
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| 154 | $data = array(<br />
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| 155 | 'title' => $title,<br />
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| 156 | 'name' => $name,<br />
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| 157 | 'date' => $date<br />
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| 158 | );<br />
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| 159 | <br />
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| 160 | $this->db->insert('mytable', $data);
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| 161 | <br /><br />
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| 162 | // Produces: INSERT INTO mytable (title, name, date) VALUES ('{$title}', '{$name}', '{$date}')</code>
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| 163 |
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| 164 |
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| 165 |
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| 166 |
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| 167 | </div>
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| 168 | <!-- END CONTENT -->
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| 169 |
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| 170 |
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| 171 | <div id="footer">
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| 172 | <p>
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| 173 | Previous Topic: <a href="index.html">Database Class</a>
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| 174 | ·
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| 175 | <a href="#top">Top of Page</a> ·
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| 176 | <a href="../index.html">User Guide Home</a> ·
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| 177 | Next Topic: <a href="configuration.html">Database Configuration</a>
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| 178 | <p>
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| 179 | <p><a href="http://www.codeigniter.com">Code Igniter</a> · Copyright © 2006 · <a href="http://www.pmachine.com">pMachine, Inc.</a></p>
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| 180 | </div>
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| 181 |
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