[php-src] Issue #9334: wish: alternative to "whitescreen of death"

Issue: https://github.com/php/php-src/issues/9334 Author: RichardNeill ### Description On a production system, it's sensible to have display_errors off. However, this means that, if something does go wrong, all the user sees is a blank whitescreen. (they do get a HTTP-500 code, but unlike the Apache Server-500 error page, there is no associated text). I've just discovered that some of of my end-users variously assumed the "whitescreen of death" actually meant one of: * "Everything is OK, we acted on your request" (like the Unix idiom of verbose on error, silent on success). * Browser timeout or network error (please refresh). * Permission denied. * User error. Rather than correctly interpreting it as: * "Sorry, the developer/admin did something stupid, and is blissfully unaware of it, and would really have appreciated you telling them". So, my wish is that, when PHP dies "silently" e.g. due to a syntax error, or a missing function, it should either use the standard Apache Error-500 page, or at least print the words "Server Error" (or similar) on screen. Thanks.