. (dot) get variables

From: Date: Wed, 21 Jun 2000 22:02:59 +0000
Subject: . (dot) get variables
Groups: php.general 
Request: Send a blank email to php-general+get-2543@lists.php.net to get a copy of this message
Why is it when you name a get variable .var it turns into _var during php execution? Is there any benifit to this?

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