pre-screening pages before served?

From: Date: Mon, 20 Jul 2009 19:22:33 +0000
Subject: pre-screening pages before served?
Groups: php.general 
Request: Send a blank email to php-general+get-295608@lists.php.net to get a copy of this message
Hi everyone, Is it possible to have the system pre-screen a page before it is sent to a user? What I mean is, if someone requests index.php could I have a script scan the file before I serves it? The reason I ask is this way I could check for patterns on the script to make sure the page hasn't been tampered with live, so to speak. Chris

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