phoenixlaef

jkhongusc thanks heaps for your help!

This is my first attempt at writing php let alone for wordpress, so i really appreciate your input.

Using function_exists I was able to troubleshoot and yes you were right… once I added:

require_once('./wp-admin/includes/ms.php');
       if ( $user ) {
		wpmu_delete_user( $user->ID );
		}

The user was FINALLY deleted!

So for the sake of future readers here was the final code:

function handle_gateway_return() {

		$GWPass = get_option( $this->gateway . "_gateway_gwpass" );

		if ($_GET["GWPass"] != $GWPass) {     

		header("HTTP/1.0 401 Unauthorized");

		echo "<h1>Gateway 1.1</h1><h3>Authentication failed.</h3>";

		exit;  

		}

//==================================================

// Action: user.add

//==================================================

		if ($_GET["Action"] == "user.add") { 	

		// Load variables.

		$ZFirstName		   = trim($_GET['FIRSTNAME']);

		$ZLastName		= trim($_GET['LASTNAME']);

		$ZFullName		= $ZFirstName." ".$ZLastName;

		$ZUserName		= trim($_GET['username']);

		$ZEmail			= trim($_GET['EMAIL']);

		$ZPassword		= trim($_GET['password']); 

		$ZPassword		= md5($ZPassword); //md5

		if ( !username_exists( $ZUserName ) ) {
			wp_create_user( $ZUserName, $ZPassword, $ZEmail );
		}	

		// Tell server that user was added

		echo "OK|User added!";
		 exit;
          } 

//==================================================

// Action: user.delete

//==================================================

else if ($_GET["Action"] == "user.delete") { 

     $ZUserName = trim($_GET['username']);

     $user = get_user_by( 'login', $ZUserName );

     require_once('./wp-admin/includes/ms.php');
	if ( $user ) {
		wpmu_delete_user( $user->ID );
		} else {
			echo "User Not Deleted!";
			exit;
		}

                // Tell server user deleted
		echo "OK|User deleted!";
		exit;
		}

//==================================================

// Action: UNKNOWN

//==================================================

		else { 

		echo "UNKNOW_ACTION|UNKNOW_ACTION";
		exit;
		}
}