infinite looping httpd processes

Hi there, we are running PHPv4.0.0 on Red hat linux 6.2, on normal Intel boxes... and we are finding some of our apache processes are infinite looping (due to some badly written PHP no doubt.). Anyway, does anybody know of anyway that we can work out which script is being run to cause this? Currently our only diagnostic tool is top, and this just tells us as much as httpd is infinite looping and the PID. We cant use apache logs to find the script name as we have had to disable them, we get over 1,000 pageviews on our site a second, and its over 50GB a day of crap!! Is there anyway to find out which script is causing this problem? We have over 1,000 different scripts also, so its a needle in a haystack! Thanks in advance, Adam