How to get `$_POST` query when 404 redirected through .htaccess?

Question

This question is somewhat related to my previous question. The trick of using $_SERVER[\'REDIRECT_QUERY_STRING\'] seems to work only for $_GET var

Answer 1

Use the FallbackResource directive instead of the ErrorDocument directive of Apache: it does the trick FallbackResource on Apache website

Example:

FallbackResource /404.php