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<?php
 $db_host = "localhost";
 $db_name = "sa";
 $db_user = "";
 $db_pass = "";

 try{

  $db_con = new PDO("mysql:host={$db_host};dbname={$db_name}",$db_user,$db_pass);
  $db_con->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
 }
 catch(PDOException $e){
  echo $e->getMessage();
 }
?>