php parse string without decoding

Question

My $_SERVER['QUERY_STRING'] returns this:

route=common/home/test/aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g%2Fdj1iZWsxeTJ1aVFHQQ%3D%3D/456&param2=test

As we can see that there is base64 encoded string passed with get request. I want to parse route parameter without decoding its value.

I need this one:

common/home/test/aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g%2Fdj1iZWsxeTJ1aVFHQQ%3D%3D/456

Not this one:

common/home/test/aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g/dj1iZWsxeTJ1aVFHQQ==/456

I tried to parse route parameter with parse_str function. But it decoded the route's value.

Answer 1

You could essentially replicate parse_str but without applying urldecode:

$x = $_SERVER['QUERY_STRING'];
$y = explode('&', $x);

$qs = [];

foreach($y AS $z) {
    list($key, $val) = explode('=', $z);
    $qs[$key] = $val;
}

Which should give you

array(2) {
  ["route"]=> string "common/home/test/aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g%2Fdj1iZWsxeTJ1aVFHQQ%3D%3D/456"
  ["param2"]=> string "test"
}