extract/delete a portion of a quesrystring

[koray]

HI,

How can I extract a portion of a quesrystring?

I came up with the following function to use with header(). Got tired of having to rewrite the bit about including existing quesrystrings along with the new message I wanted to send in the URL paramater. Here it is:

function actnRdrct($file, $message) {

$qs = "mssg";

$goto = $file;

if ((isset($message)) && ($message != "")) {
	$goto .= "?".$qs."=".$message;
}

if ((isset($_SERVER['QUERY_STRING'])) && ($_SERVER['QUERY_STRING'] != "")) {
	$goto .= (strpos($goto, '?')) ? "&" : "?";
  	$goto .= $_SERVER['QUERY_STRING'];
}

return $goto;
}

$mylink = actnRdrct("file.php", "delete");
produces: file.php?mssg=delete&existing=querystring

AND here is my problem with it.

It works but . . . When used consecutively the "mssg" string is duplicated. How can I delete the "mssg" if it already exists in the current querystring or change the value so that it is not duplicated.

I hope that was clear.

I'd greatly appreciate any help. Thanks

Koray

[LordShryku]

The $GET superglobal is your friend here. Just put a check in there and replace it before you set it again.

if(isset($_GET['mssg'])) {
   $goto = str_replace("mssg=".$_GET['mssg'],"",$goto);
}

[koray]

Thank you, Lord. Works perfectly now.

Koray