Creating a PHP-based HTTP 404 error page

[Anon]

Dear all,

I'm just wondering if anyone has tried making a default HTTP 404 error page with PHP.

What I'm trying to do is this. Everytime someone clicks on a bad internal link, I'd like to HTTP 404 error page to send me the following by email:

The referring page
The exact URL of the bad link.

I know that I can use the http referer to tell me what the referring page is (the page containing the bad/broken link). But how do I reference the URL of the bad link? Is there a server or CGI variable that will tell me what the link is?

[lucianoes]

This is false PHP! Don't try to run this code as it is because it will certainly not work. I wrote it just to give you an idea:

if (everything == OK)
{sendheaders ();}
// I mean, the GOOD headers!

else
{header("HTTP/1.0 404 Not Found");
include ("beautifully_crafted_error_page.inc");

$message = "Someone coming from $HTTP_REFERER tried to reach some $SCRIPT_NAME, I don't know what they were thinking...";

mail("[e-mail]", "warning - fumbling visitor tripping over", "$message");

Enjoy!
Luciano ES
Santos, SP - Brasil

[Anon]

$REDIRECT_URL will contain the bad url.