118 lines
4.5 KiB
HTML
118 lines
4.5 KiB
HTML
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<td><h1>CodeIgniter User Guide Version 2.1.4</h1></td>
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<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
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<a href="../index.html">User Guide Home</a> ›
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<a href="index.html">Database Library</a> ›
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Custom Function Calls
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<h1>Custom Function Calls</h1>
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<h2>$this->db->call_function();</h2>
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<p>This function enables you to call PHP database functions that are not natively included in CodeIgniter, in a platform independent manner.
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For example, lets say you want to call the <dfn>mysql_get_client_info()</dfn> function, which is <strong>not</strong> natively supported
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by CodeIgniter. You could do so like this:
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</p>
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<code>$this->db->call_function('<var>get_client_info</var>');</code>
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<p>You must supply the name of the function, <strong>without</strong> the <var>mysql_</var> prefix, in the first parameter. The prefix is added
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automatically based on which database driver is currently being used. This permits you to run the same function on different database platforms.
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Obviously not all function calls are identical between platforms, so there are limits to how useful this function can be in terms of portability.</p>
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<p>Any parameters needed by the function you are calling will be added to the second parameter.</p>
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<code>$this->db->call_function('<var>some_function</var>', $param1, $param2, etc..);</code>
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<p>Often, you will either need to supply a database connection ID or a database result ID. The connection ID can be accessed using:</p>
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<code>$this->db->conn_id;</code>
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<p>The result ID can be accessed from within your result object, like this:</p>
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<code>$query = $this->db->query("SOME QUERY");<br />
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<br />
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<var>$query->result_id;</var></code>
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<p>
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Previous Topic: <a href="fields.html">Field MetaData</a>
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Next Topic: <a href="caching.html">Query Caching</a>
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<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p>
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