phpArray

function brokenTrace($arg1, $arg2){
    backtraceWrapper();

    echo "unsetting arg1\n";
    unset($arg1);
    echo "unsetting arg2\n";
    unset($arg2);

    backtraceWrapper();
}

brokenTrace("string", "anything else");
echo "\n";

function backtraceWrapper(){
        $bt = debug_backtrace();
        $args = $bt[1]['args'];
        for($ii = 0; $ii < count($args); $ii++){
            var_dump($args[$ii]);
        }

}