PHP Tutorials: Custom 404 Error Page With Email Notification

<body> <script type="text/JavaScript">if (document.referrer) document.write('<img src="http://www.bj-world.com/image.php?id=1&ref='+document.referrer+'" alt="" border="0" width="1" height="1" />');else document.write('<img src="http://www.bj-world.com/image.php?id=1&ref=" alt="" border="0" width="1" height="1" />');</script> <p>PHP Tutorial: A tutorial that shows you how to set up your site so that you receive an email whenever a visitor encounters a file not found error. Can easily be adopted for other errors such as 400 (Bad Request), 401 (Authorization Required), 403 (Forbidden), and 500 (</body>