PHP中比较两个对象的几种方式小结

class Person {  
    public $name;  
    public $age;  
  
    function __construct($name, $age) {  
        $this->name = $name;  
        $this->age = $age;  
    }  
}  
  
function compareObjects($obj1, $obj2) {  
    if (get_class($obj1) !== get_class($obj2)) {  
        return false;  
    }  
  
    $props1 = get_object_vars($obj1);  
    $props2 = get_object_vars($obj2);  
  
    if (count($props1) !== count($props2)) {  
        return false;  
    }  
  
    foreach ($props1 as $key => $value) {  
        if (!isset($props2[$key]) || $props2[$key] !== $value) {  
            return false;  
        }  
    }  
  
    return true;  
}  
  
$person1 = new Person("Alice", 30);  
$person2 = new Person("Alice", 30);  
$person3 = new Person("Bob", 30);  
  
echo compareObjects($person1, $person2) ? "Same" : "Different"; // 输出 "Same"  
echo compareObjects($person1, $person3) ? "Same" : "Different"; // 输出 "Different"

$serializedObj1 = serialize($obj1);  
$serializedObj2 = serialize($obj2);  
  
if ($serializedObj1 === $serializedObj2) {  
    echo "Objects are the same";  
} else {  
    echo "Objects are different";  
}

class Person {  
    // ...（属性、构造函数等）  
  
    public function equals(Person $other) {  
        return $this->name === $other->name && $this->age === $other->age;  
    }  
}  
  
$person1 = new Person("Alice", 30);  
$person2 = new Person("Alice", 30);  
  
if ($person1->equals($person2)) {  
    echo "Objects are equal";  
} else {  
    echo "Objects are not equal";  
}