class Person {
private $name;
private $age;
private $id;
function __construct( $name, $age ) {
$this->name = $name;
$this->age = $age;
}
function setId( $id ) {
$this->id = $id;
}
function __clone() {
$this->id = 0;
}
}
$p = new Person("A",10);
if ( is_a( $p, 'Person' ) ) {
print "\$p is a Person object\n";
}
?>