<?php

 /* Connect to an ODBC database using driver invocation */

 $dsn  =  'mysql:dbname=xb;host=127.0.0.1';

 $user  =  'root' ;

 $password  =  '123456';

try {

     $dbh  = new  PDO ( $dsn ,  $user ,  $password );

} catch ( PDOException $e ) {

    echo  'Connection failed: '  .  $e -> getMessage ();

}