note 30484 added to language.variables.predefined

From: Date: Wed, 19 Mar 2003 15:18:09 +0000
Subject: note 30484 added to language.variables.predefined
Groups: php.notes 
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Warning: If you use dynamic variables in a local scope, the variable doesn't "know" when it should be a superglobal. An example will help elucidate this: function Example($Variable_Name='_POST') { print_r($$Variable_Name); } // End Example This would print out NULL To use a dynamic variable to reference a superglobal, you have to declare the value (not the name) as a global: function WorkingExample($Variable_Name='_POST') { global $$Variable_Name; print_r($$Variable_Name); } // End WorkingExample() This would print out the contents of your $_POST variable. This threw me when I first tried it, but it makes sense, in a way. -- http://www.php.net/manual/en/language.variables.predefined.php http://master.php.net/manage/user-notes.php?action=edit+30484 http://master.php.net/manage/user-notes.php?action=delete+30484 http://master.php.net/manage/user-notes.php?action=reject+30484

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