PHP/MySQL Database/sqlite create function

sqlite_create_function.php

 
<?php
   define("PPO",400);
   function my($salary){
      return $salary / PPO;
   }
   $sqldb = sqlite_open("mydatabase.db");
   sqlite_create_function($sqldb,"myFunction", "my", 1);
   $query = "select myFunction(salary) FROM employee WHERE empid=1";
   $result = sqlite_query($sqldb, $query);
   list($myFunction) = sqlite_fetch_array($result);
   echo "The employee can purchase: ".$myFunction." ounces.";
   sqlite_close($sqldb);
?>