note 68723 deleted from reserved.variables by felipe

Note Submitter: trevor 

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I needed to do the exact same thing as jwl007 (sort by clicking links) but I needed it to append the variable to the query string if it didn't already exist. Here's the function I'm using:

<?php
function setGetVar($var, $val){
	$request_uri = $_SERVER["REQUEST_URI"];
	if(strstr($request_uri, $var)) {
		return preg_replace("/$var=[\\d\\w]*/", "$var=$val", $request_uri);
	} elseif(strstr($request_uri, "?")) {
		return $request_uri . "&" . $var . "=" . $val;
	} else {
		return $request_uri . "?" . $var . "=" . $val;
	}
}
?>

<a href="<?php echo setGetVar("orderby", "lname"); ?>">Sort by Last Name</a>
<a href="<?php echo setGetVar("orderby", "fname"); ?>">Sort by First Name</a>