<?php




 $pass = $row["password"];
 $username = $row["username"];


 if (SHA1(CONCAT(UPPER(`$_POST["nick"]`), ':', UPPER(<$_POST["pw"]>))) == SHA1(CONCAT(UPPER(`$username`), ':', UPPER(<$pass>))))
 {
 echo "bla bla bla";
 }
 else{
 die()
 }

 ?>