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Asked: 2010-08-17 07:36:40 +0800 CST

Why is PHP $_REQUEST array empty?

  • 772

I installed nginx on Ubuntu Hardy and immediately realized that the PHP scripts were getting empty request arrays, ie whether GET or POST nothing was coming through, even the $_REQUEST array was empty.

When I switch back to Apache it was all fine.

The installation nginx version is 0.6.35-0ubuntu1.1~hardy1 and PHP is PHP Version 5.2.4-2ubuntu5.10.

What could be wrong?

php nginx request

4 Answers

  1. Best Answer

    Check if this set in your "location"-section for your fastcgi-module

     fastcgi_param  QUERY_STRING     $query_string;

    http://wiki.nginx.org/NginxHttpFcgiModule

    • 6

  2. It's a feature of the try_files command in nginx that the query_string is not passed automatically to the rewritten file but instead must be passed explicitly. Because of this _$SERVER['QUERY_STRING'] is always empty, and so the the variables $_REQUEST and $_GET are also not set.

    From the Nginx documentation:

    Unlike with rewrite, $args are not automatically preserved if the fallback is not a named location. If you need args preserved, you must do so explicitly:

    try_files $uri $uri/ /index.php?q=$uri&$args;

    or with just the arguments

    try_files $uri $uri/ /index.php?$args;

    If you want to guarantee to get the original arguments then use $query_string which is the same as $args except that $query_string is read-only.

    • 6

  3. Try to check the variables_order in php config file used by nginx.

    • 0

  4. It can happen if Apache has LimitRequestBody (see core) or SecRequestBodyLimit (see mod_security) set and the request body is larger than said limit.

    • 0