Description:
------------
Exact same issue (that was supposedly resolved) as #44425, but now with a MySQL 5.1 database.

__call() doesn't do anything when extending PDO.

This bug is clearly not fixed.

Reproduce code:
---------------
Reproduce code:
---------------
<?php
class test extends PDO {
    function __call($name, array $args) {
        echo "Called $name in ".__CLASS__.'<br>';
    }
    function foo() {
        echo "Called foo in ".__CLASS__.'<br>';
    }
}
$a = new test('mysql:dbname=test;host=localhost','user','pw');
$a->foo();
$a->bar();
?>

Expected result:
----------------
"Called foo in test
Called bar in test"


Actual result:
--------------
Called foo in test<br>
Fatal error: Call to undefined method test::bar() in test4.php on line 12