get http url parameter without auto decoding using PHP

Question

I have a url like

test.php?x=hello+world&y=%00h%00e%00l%00l%00o

when i write it to file

file_put_contents('x.txt', $_GET['x']); // -->hello world
file_put_contents('y.txt', $_GET['y']); // -->\0h\0e\0l\0l\0o 

but i need to write it to without encoding

file_put_contents('x.txt', ????); // -->hello+world
file_put_contents('y.txt', ????); // -->%00h%00e%00l%00l%00o

how can i do?

Thanks

Answer 1

You can get unencoded values from the $_SERVER["QUERY_STRING"] variable.

function getNonDecodedParameters() {
  $a = array();
  foreach (explode ("&", $_SERVER["QUERY_STRING"]) as $q) {
    $p = explode ('=', $q, 2);
    $a[$p[0]] = isset ($p[1]) ? $p[1] : '';
  }
  return $a;
}

$input = getNonDecodedParameters();
file_put_contents('x.txt', $input['x']);