Description:
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Even when enabled in a router php's built-in webserver does not report any errors coming from the router or included scripts.

Note that it's currently necessary to do php execution from a router using a require instead of by using `return false;` because of virtual paths where a "/fake-nonexistent-path" may be desired to be routed to "/somescript.php" instead of attempting to serve the file "fake-nonexistent-path" in the docroot. The api does not seem to have a way to `return false;` telling the server to serve a completely different file so the only way to have this behavior is to use a require call.

Obviously it would also be nice for errors to be reported simply so that you can fix bugs in the router itself as well.

Test script:
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# ./router.php
<?php

ini_set('display_errors', 1);
error_reporting(E_ALL); 

require_once( "./a.php" );

# ./a.php
<?php

this is a syntax error;


Expected result:
----------------
The page output is expected to have an error report something like:

Parse error: syntax error, unexpected 'is' (T_STRING) in /path/to/a.php on line 3

Actual result:
--------------
The outputted page is blank. No php error report or anything at all.