PHP 5.2.6 - 'sleep()' Local Memory Exhaust

There is some kind of issue in PHP we can run out memory even on SAFEMODE script simply allocate maximum of memory and go to sleep for, let's say 9999999 seconds. sleep pass 'maxexecutiontime' setting. Ram eater sploit ? if ! $purl = @parseurl$url die'sorry, parseurl function disabled Oo'; if !...