Mail PHP error messages

error_handling.php

<?php

//
// Custom error handler
//

function new_error_handler($number, $message, $file, $line, $vars) {

    $message = "

        <p>http://{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}</p>
        <p>An error ({$number}) occurred on line</p>
        <strong>{$line}</strong> and in the <strong>file: {$file}.</strong>
        <p>{$message}</p>

    ";

    $headers = 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

    if(in_array($_SERVER['REMOTE_ADDR'], array('127.0.0.1'))) {

        die($message);

    } else {

        error_log($message, 1, 'your.email@domain.com', $headers);

    }

}

set_error_handler('new_error_handler');