PHP - How do I get a parameter value from $_SERVER['HTTP_REFERER']?

parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $queries);
echo $queries['q'];

References:

http://php.net/parse_url
http://php.net/parse_str

Try these:

• parse_url(): http://php.net/manual/en/function.parse-url.php.
• parse_str(): http://www.php.net/manual/en/function.parse-str.php