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Remove Duplicate QueryStrings from URL using PHP

This simple PHP function is used to Remove Duplicate QueryStrings from URL.

Function:
function rnsQueryString_dupremov($qstring){
    if(!empty($qstring)) {
    $vars = explode('&', $qstring);
    $final = array();
    if(!empty($vars)) {
        foreach($vars as $var) {
            $parts = explode('=', $var);
   
            $key = $parts[0];
            if(!empty($parts[1])) { $val = $parts[1]; } else {$val="";}
   
            if(!array_key_exists($key, $final) && !empty($val))
                $final[$key] = $val;
        }
    }
    return http_build_query($final);
    } else { return false; }
}

 Example:

$path="property_add.php?id=3&aa=aa&b=123&b=123&aa=aa";

 define('RNSFIWQ', property_add.'?'.rnsQueryString_dupremov($_SERVER['QUERY_STRING'])); 
or
define('RNSFIWQ', basename($_SERVER['SCRIPT_NAME'].'?'.rnsQueryString_dupremov($_SERVER['QUERY_STRING']));

 echo RNSFIWQ;

 Output:

 property_add?id=3&aa=aa&b=123





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