php defining variable defaults?

From: Date: Thu, 13 Feb 2003 22:11:34 +0000
Subject: php defining variable defaults?
Groups: php.windows 
Request: Send a blank email to php-windows+get-18532@lists.php.net to get a copy of this message
ok cold fusion has the ability to do a <cfparam name='' default=''> this lets you specify a variable name to be defaulted to a value if it is called without being defined. I usually use this for variables specified by forms either by GET or POST. now I can't find it's equivalent in PHP.. can anyone direct me in the correct direction?

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