PHP program to initialize data members without using the constructor

<?php
//PHP program to initialize data members without
//using the constructor.
class Student
{
    //Attributes
    private $id;
    private $name;
    private $per;

    function Initialize()
    {
        $this->id = 0;
        $this->name = "";
        $this->per = 0.0;
    }

    function Display()
    {
        print ("Student Id            : " . $this->id . '<br>');
        print ("Student Name          : " . $this->name . '<br>');
        print ("Student Percentage : " . $this->per . '<br>');
    }
}

$S = new Student();

$S->Initialize();
$S->Display();
?>

Output
Student Id : 0
Student Name :
Student Percentage : 0