How to debug the php scripts?

From: Date: Thu, 24 Jul 2003 04:09:12 +0000
Subject: How to debug the php scripts?
Groups: php.general 
Request: Send a blank email to php-general+get-156592@lists.php.net to get a copy of this message
Is there any useful implement to debug the php scripts,just like Visual studio.Now I'm using "echo" to debug the scripts,it disgusts me:(

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