How can I get PHP to produce a backtrace upon errors?

Question

Trying to debug PHP using its default current-line-only error messages is horrible. How can I get PHP to produce a backtrace (stack trace) when errors are produced?

Answer 1

This is how you do it:

set_error_handler(function($errorType){
    if(error_reporting() & $errorType){
        ?>

It requires PHP 5.3+ since it uses a closure. If you need lower PHP support just convert the closure to a normal function.