note 91030 deleted from language.references.pass by danbrown

Note Submitter: Neil Young ---- To add to what pillepop2003 at yahoo dot de pointed out, in PHP if you call an undefined variable by reference, the variable is created - for example: <?php ini_set('display_errors', true); ini_set('error_reporting', E_ALL); function Test(&$val) { return; } var_dump($foo); // Notice: Undefined variable: foo... // Output: NULL Test($foo); // No notice var_dump($foo); // No notice // Output: NULL ?> So now $foo exists after the pass by reference even though it didn't exist before and wasn't set in the function