Hàm hủy (__destruct)

<?php
class Resource {
    public $name;

    public function __construct($name) {
        $this->name = $name;
        echo $this->name . " was created\n";
    }

    public function __destruct() {
        echo $this->name . " was destroyed\n";
    }
}

echo "=== Start ===\n";
$r = new Resource("Connection");
echo "Using " . $r->name . "\n";
unset($r);  // hủy đối tượng (object) một cách tường minh
echo "=== End ===\n";

=== Start ===
Connection was created
Using Connection
Connection was destroyed
=== End ===

$r = new Resource("Logger");
echo "Working...\n";
// __destruct tự động được gọi khi tập lệnh kết thúc

Logger was created
Working...
Logger was destroyed