How can I tell the difference between a variable whose value is null and a variable which is not set?
// cannot use === null: ket% php -r '$null = null; var_dump(null === $null);' bool(true) ket% php -r 'var_dump(null === $unset);' bool(true) ket% // - cannot use isset() either: ket% php -r '$null = null; var_dump(isset($null));' bool(false) ket% php -r 'var_dump(isset($unset));' bool(false) ket% -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
