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    <p>There are four ways to accomplish this depending on what you are using, the last being the much more reliable.</p> <h1><strong>The General Query Log</strong></h1> <p>MySQL provides a mechanism to log just about everything that the <code>mysqld</code> process is doing, via the general query log. As you described in your question you probably do not have persistent connections, so you will need to either:</p> <ul> <li>Enable the MySQL general query log when the <code>mysqld</code> process is started, with the <a href="http://dev.mysql.com/doc/refman/5.1/en/server-options.html#option_mysqld_log" rel="nofollow"><code>--log[=file_name]</code></a> <ul> <li>Set a global/session variable with <code>SET GLOBAL general_log = 'ON'</code>.</li> </ul></li> </ul> <p>Fore more information about the general query log, see the <a href="http://dev.mysql.com/doc/refman/5.1/en/query-log.html" rel="nofollow">MySQL 5.1 reference manual</a>.</p> <h1><strong>Using <code>sed</code> (or manually!)</strong></h1> <p>This technique involves creating a a new function, and renaming all of the <code>mysqli_*</code> function calls to call another function.</p> <p>Presuming your newly created function is named <code>proxy_query()</code>, you can use <code>sed</code> to traverse through all files and change them automatically:</p> <pre><code>sed i '.bck' 's/mysqli_query/proxy_query/' </code></pre> <p>The <code>-i</code> paramater specifies that the file should be edited in place, and that a copy should be made of the original file and have a <code>.bck</code> extension appended.</p> <h1><strong>The <code>runkit</code> extension</strong></h1> <p>I must admit that I'm being naive here, and that I haven't used this particular extension before - but it is possible to rename functions with this PECL extension. The requirements for this extension can be found here, and note that it is <em>not</em> bundled with PHP.</p> <p>As with above, you can create a proxy function where all calls will go through. Let's assume it's also called <code>proxy_query</code>. Usage would go something like this:</p> <pre><code>// rename the function (a very bad idea, really!) runkit_function_renam('mysqli_connect', 'proxy_super'); function mysqli_query($query, $resultmode = MYSQLI_STORE_RESULT) { // do something with the SQL in $query // .. and call mysqli_query, now proxy_super return proxy_super($query, $resultmode); } </code></pre> <p>I have to note here that <strong>this method is highly discouraged</strong>. You shouldn't ever need to set default PHP functions.</p> <h1><strong>Using Pdo/OO-mysqli</strong></h1> <p>This is the simplest technique, and probably the most reliable as well. If you're using Pdo already, you can simply extend the <code>\Pdo</code> class. A similar approach could be used with MySQL Improved(<code>mysqli</code>):</p> <pre><code>class MyPdo extends \Pdo { public function query($query [, ... ]) { // do something with $query return parent::query($query [, ... ]); } } </code></pre> <p>Also note here, that this will only work if you are using Pdo, and if you are able to change the instantiation of the <code>Pdo</code> object, to overwrite it to your own class: <code>MyPdo</code>. For more information about the <code>\Pdo</code> class, and it's children, see the <a href="http://www.php.net/manual/en/book.pdo.php" rel="nofollow">manual</a>.</p>
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    1. POHow to route every mysql query through a function?
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    1. COIn the same way you can extend `mysqli`
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    2. COindeed. forgot that mysqli can be used as OO. :(
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    3. COI am not using PDO. I am using mysql_query()
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      1. USGaurav Saxena
 

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