try:
<?php
$str="member.php?action=bla&arg=2&test=15&schedule=16#test";
preg_match_all('/([^?&=#]+)=([^&#]*)/',$str,$m);
print_r($m);

//combine the keys and values onto an assoc array
$data=array_combine( $m[1], $m[2]);
print_r($data);
?>