Description:
------------
<?php
// PHP Version 5.3.3
ini_set('display_errors', '1');
error_reporting(-1);

class a {
    
    public function func1($a)
    {
        echo "<br>A = " . $a;
    }
    
    public function func2()
    {
        $this->func1(5, 6);
    }
    
}


$c = new a();
$c->func2();

Test script:
---------------
<?php
// PHP Version 5.3.3
ini_set('display_errors', '1');
error_reporting(-1);

class a {
    
    public function func1($a)
    {
        echo "<br>A = " . $a;
    }
    
    public function func2()
    {
        $this->func1(5, 6);
    }
    
}


$c = new a();
$c->func2();

Expected result:
----------------
Fatal Error / Warning / Notices.

Actual result:
--------------
No Warnings/ Notices/ Fatal error.