Replacing a specific part of a query string PHP

Question

I use $_SERVER['QUERY_STRING'] to get the query sting.

A example would be a=123&b=456&c=789

How could I remove the b value from the query string to obtain a=123&c=789 where b can be any value of any length and is alpha numeric.

Any ideas appreciated, thanks.

Answer 1

A solution using url parsing:

parse_str($_SERVER['QUERY_STRING'], $result_array);
unset($result_array['b']);
$_SERVER['QUERY_STRING'] = http_build_query($result_array);