Einige Möglichkeiten PHP Systemvariablen zu ermitteln
// get all defined variables:
$v = get_defined_vars();
print_r($v);// get all defined objects
$v = get_object_vars();
print_r($v);// classic
phpinfo();// php version (something like: 4.3.10)
print phpversion();[/php]
Quelle: jonasjohn.de