Find URL that caused a 404

[baffled_in_UK]

Hi,

I'm using htaccess to redirect 404's to a custom 404 page (nothing clever there I know). What I want to be able to do is use PHP to find out the URL that actually caused the redirect/404. I'm getting quite a lot and I need to know where they're coming from.

I have tried $_SERVER['REQUEST_URI'] on my 404 page but all that retrieves is /404.php and I need the previous URL.

Thanks for any pointers.

[dagon]

print_r($_SERVER);

it will be in the server array

[baffled_in_UK]

Thanks for the reply but that's not correct. That only shows the /404.php

[dagon]

it is, it's in the server array, i just cant remember which vlaue

[bradgrafelman]

How are you doing the redirection? How is PHP integrated with Apache (ISAPI module or CGI binary)?

Using an ErrorDocument approach with PHP integrated as an ISAPI module, dagon is correct - the original request can be found in either $SERVER["REDIRECT_URL"] or $SERVER["REQUEST_URI"].

[baffled_in_UK]

I'm using .htaccess to redirect

ErrorDocument 404 http://www.xxxxx.com/404.php

In the 404.php file :
echo $SERVER["REQUEST_URI"]; shows /404.php
echo $SERVER["REDIRECT_URL"]; shows nothing
print_r($_SERVER); shows (I've x'd out sensitive values but there was no value that showed the url I typed to create the 404)

Array ( [PATH] => /xxxx/xxxxx/bin:/usr/bin:/bin [UNIQUE_ID] => xxxxxxxxxxxxxxxxxxxxxx [MvCONFIG_LIBRARY] => /xxxx/xxxxx/miva/lib/config/env.so [MvCONFIG_DIR_BUILTIN] => /xxxx/xxxxx/miva/lib/builtins [MvCONFIG_DIR_CA] => /xxxx/xxxxx/miva/certs [MvCONFIG_SSL_OPENSSL] => /xxxx/xxxx/libssl.so [MvCONFIG_SSL_CRYPTO] => /xxxx/xxxx/libcrypto.so [MvCONFIG_DIR_MIVA] => /home/sites/xxxxxx/xxxxxxxx [MvCONFIG_DIR_DATA] => /home/sites/xxxxxx/mivadata [HTTP_ACCEPT] => image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/msword, application/vnd.ms-powerpoint, application/vnd.ms-excel, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/x-shockwave-flash, / [HTTP_ACCEPT_LANGUAGE] => en-gb [HTTP_USER_AGENT] => Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Sky Broadband; GTB6; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.21022; .NET CLR 3.5.30729) [HTTP_ACCEPT_ENCODING] => gzip, deflate [HTTP_HOST] => xxx.xxxxxx [HTTP_CONNECTION] => Keep-Alive [HTTP_COOKIE] => utma=xxxxxxxxx.xxxxxxxxx.1278195231.1278195231.1278197885.2; utmz=126015128.1278195231.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); comm100_33155=2; hcl_chatid=1; hcl_nick=xxxx; PHPSESSID=xxxxxx[SERVER_SIGNATURE] =>
Apache/2 Server at xxx.xxxxxx Port 80
[SERVER_SOFTWARE] => Apache/2 [SERVER_NAME] => xxx.xxxxxx [SERVER_ADDR] => xx.xxx.xx.xx [SERVER_PORT] => 80 [REMOTE_ADDR] =>xx.xxx.xx.xx [DOCUMENT_ROOT] => /home/sites/xxxxxx/xxxxxxxxx/ [SERVER_ADMIN] => webmaster@xxxxxx [SCRIPT_FILENAME] => /home/sites/xxxxxx/xxxxxxxx/404.php [REMOTE_PORT] => 1828 [GATEWAY_INTERFACE] => CGI/1.1 [SERVER_PROTOCOL] => HTTP/1.1 [REQUEST_METHOD] => GET [QUERY_STRING] => [REQUEST_URI] => /404.php [SCRIPT_NAME] => /404.php [PHP_SELF] => /404.php [argv] => Array ( ) [argc] => 0 )

[bradgrafelman]

Sounds like PHP was integrated as a CGI binary rather than an ISAPI module, in which case it's likely that the redirect information is lost.

You could instead use mod_rewrite to redirect all requests that don't point to a valid file or directory to your script and pass the original URI as a parameter in the query string.

[baffled_in_UK]

Thank you.

I've changed my .htaccess to show

RewriteEngine On
RewriteCond %{SCRIPT_FILENAME} !-f
RewriteCond %{SCRIPT_FILENAME} !-d
RewriteRule ^(.*)$ 404.php/$1

and am then using $_SERVER["REDIRECT_URL"]; to get the problem url.

Thanks again.