Catch PHP Fatal Error

PHP does send a HTTP 500 on a Fatal error.
Let me cite a comment in this PHP bug-report (a xdebug bug prevents this behavior):

It does happen. It requires that:

1) display_errors = off
2) No headers have been sent yet by the time the error happens
3) Status is 200 at that time.

<?
    ini_set('display_errors', 0); 
    foobar();
    // This will return a http 500
?>

You can catch fatal errors with a shutdown function and error_get_last:

register_shutdown_function(function() {
    $lastError = error_get_last();

    if (!empty($lastError) && $lastError['type'] == E_ERROR) {
        header('Status: 500 Internal Server Error');
        header('HTTP/1.0 500 Internal Server Error');
    }
});

One possible way would be to set the default response to 500, if everything executes successfully set the response to 200:

http_response_code(500);
render_my_page();
http_response_code(200);

I developed a way to catch all error types in PHP (almost all)! I have no sure about E_CORE_ERROR ( I think it will not work for that error)! But, for other fatal errors (E_ERROR, E_PARSE, E_COMPILE...) works fine using only one error handler function! There's my solution:

Put this following code on your main file (index.php):

<?php

define('E_FATAL',  E_ERROR | E_USER_ERROR | E_PARSE | E_CORE_ERROR | 
        E_COMPILE_ERROR | E_RECOVERABLE_ERROR);

define('ENV', 'dev');

//Custom error handling vars
define('DISPLAY_ERRORS', TRUE);
define('ERROR_REPORTING', E_ALL | E_STRICT);
define('LOG_ERRORS', TRUE);

register_shutdown_function('shut');

set_error_handler('handler');

//Function to catch no user error handler function errors...
function shut(){

    $error = error_get_last();

    if($error && ($error['type'] & E_FATAL)){
        handler($error['type'], $error['message'], $error['file'], $error['line']);
    }

}

function handler( $errno, $errstr, $errfile, $errline ) {

    switch ($errno){

        case E_ERROR: // 1 //
            $typestr = 'E_ERROR'; break;
        case E_WARNING: // 2 //
            $typestr = 'E_WARNING'; break;
        case E_PARSE: // 4 //
            $typestr = 'E_PARSE'; break;
        case E_NOTICE: // 8 //
            $typestr = 'E_NOTICE'; break;
        case E_CORE_ERROR: // 16 //
            $typestr = 'E_CORE_ERROR'; break;
        case E_CORE_WARNING: // 32 //
            $typestr = 'E_CORE_WARNING'; break;
        case E_COMPILE_ERROR: // 64 //
            $typestr = 'E_COMPILE_ERROR'; break;
        case E_CORE_WARNING: // 128 //
            $typestr = 'E_COMPILE_WARNING'; break;
        case E_USER_ERROR: // 256 //
            $typestr = 'E_USER_ERROR'; break;
        case E_USER_WARNING: // 512 //
            $typestr = 'E_USER_WARNING'; break;
        case E_USER_NOTICE: // 1024 //
            $typestr = 'E_USER_NOTICE'; break;
        case E_STRICT: // 2048 //
            $typest