class_compare.php

<?php 
//class_compare.php
class a {


    public $name   = '';
    public $age=1;


    public function __construct($name,$age) {
        $this->name   = $name;
        $this->age = $age;
    }


}


class b {


    public $name   = '';
    public $age=1;


    public function __construct($name,$age) {
        $this->name   = $name;
        $this->age = $age;
    }


}


//这里创建线程池.
$obj1 = new a('a',2);
$obj2 = new a('a',2);
$obj3 = new b('a',2);
$obj4 = new b('b',3);


if($obj1==$obj2)
    echo '$obj1==$obj2' . '<hr>';
else
    echo '$obj1!=$obj2' . '<hr>';




if($obj1===$obj2)
    echo '$obj1===$obj2' . '<hr>';
else
    echo '$obj1!===$obj2' . '<hr>';


if($obj1==$obj3)
    echo '$obj1==$obj3' . '<hr>';
else
    echo '$obj1!=$obj3' . '<hr>';




if($obj3==$obj4)
    echo '$obj3==$obj4' . '<hr>';
else
    echo '$obj3!=$obj4' . '<hr>';

$obj1==$obj2

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$obj1!===$obj2

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$obj1!=$obj3

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$obj3!=$obj4

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