php 5 constructor _construct does not work

Question

We have php 5.3.0 and I would like to use the constructor _construct. But somehow this constructor is not called when an instance of the class is made. And old constructor (

Answer 1

__construct() (two underscores)

Second question: fix the underscores in __construct() and see if this is still a problem.

Answer 2

Try:

abstract class Foo {
    function __construct() { } 
}

class Bar extends Foo{
    function __construct($arg){
        parent::_construct();
    } 
}