Error trapping

I've gone an annoying problem. On our site I've trapped "file does not exist" errors at Apache level to send out my own error screen with a company logo, link to home page and a mailto link, but this doesn't work for any request for a page that would be parsed by php if it existed. In this case a valid html page (containing the php error) is returned. The problem seems to be that as far as Apache is concerned there isn't an error. I haven't found anything in php that allows me to trap errors like this. Error reporting levels aren't helpful as I still need the error trapped. I'm sure I'm not the first person who has come across this, and I'm hoping someone out there has found a way around it. I'm running PHP 4.0.0, Apache 1.3 on NT (yes I know, but our network manager has promised me a linux box) Tim Ward Senior Systems Engineer Please refer to the following disclaimer in respect of this message: http://www.stivesdirect.com/e-mail-disclaimer.html