valid xhtml querystring

[thorpe]

i noticed that the html_specialcharacters function doesnt replace ? with there html conterparts, and im trying to make links with valid xhtml querystrings.

ive converted an old asp function of mine into php.

  function xhtml($string)
  {
    $string = str_replace("&","&",$string);
    $string = str_replace("=","=",$string);
    $string = str_replace("?","?",$string);
    return $string;
  }

just wondering if there is a built in function that will do the same?

[drawmack]

invalid xhtml query string

http://www.example.com/somepage.php?id=1&user=me

valid xhtml query string

http://www.example.com/somepage.php?id=1&[b]amp;[/b]user=me