About PHP Object-oriented-class definition and instantiation of objects and special usage of construction and destructor functions

The definition of the class and the instantiation of the object

The members of the

<?php
//class are
class hero{
    public $name that belong to the object;//member Variable
    // Member properties (in strongly typed languages)
    protected $blood;
    private $attack;
    //member methods
    function skill () {
        echo "$this->name<br>control";        
    }
}

$s = New Hero ();//Create a hero
$s->name = "Riven"; //Assign Heroes
Echo "$s->name<br>";//output Hero
$s->skill ( );

constructors, destructors
//role: Initialize some members of a class (parameter custom initial value)
Class ren{
    public $name;
    public $age;//Use type

in strongly typed languages

Old version definition Usage
/* Public Function Ren () {
echo "is constructing function";
Public Function Ren ($v) {
$this->age = $v; */

PHP new version definition usage
Public function __construct ($v) {
$this->age = $v;
}
Public Function __destruct () {
echo "Destroying files";
}
}
$s = new Ren (20);
Echo $s->age;
?>

About PHP Object-oriented-class definition and instantiation of objects and special usage of construction and destructor functions