PHP handle errors on shutdown and send by email

error_handler.php

<?php
error_reporting(E_ALL & ~ E_NOTICE);
set_error_handler('my_error_handler');
register_shutdown_function('send_error_log');

$__errors = array();
function my_error_handler($code, $message, $file, $line)
{
    if (!(error_reporting() & $code)) {
        // This error code is not included in error_reporting
        return;
    }

    global $__errors;
    $__errors[] = sprintf('<b>%s</b> (%s line %s)', $message, $file, $line);

    return;
}

function send_error_log()
{
    global $__errors;

    if (!empty($__errors)) {
        $body = count($__errors) . " Error(s):<br />";
        $body .= implode("<br>", $__errors);
        $body .= "<hr>
            Host: {$_SERVER['HTTP_HOST']}<br />
            Url: {$_SERVER['REQUEST_URI']}<br />
            IP: {$_SERVER['REMOTE_ADDR']}<br />
            User Agent: {$_SERVER['HTTP_USER_AGENT']}<br />
         ";

        mail('my@email.com', "Error on {$_SERVER['HTTP_HOST']}", $body);
    }
}