php中的类、对象

class person{    public $name;    public $gender;    public function say(){        echo $this->name."is ".$this->gender;    }}

$student = new person();$student->name="Tome";$student->gender= "male";$student->say();$teacher= new person();$teacher->name="kati";$teacher->gender= "female";$teacher->say();

print_r((array)$student);var_dump($student);

$str = serialize($student);echo $str;file_put_contents('store.txt',$str);输出结果：0:6:"person":2:{s:4:"name";s:3:"Tom";s:6:"gender";s:4:"mail";}

$str = file_get_contents('store.txt');$student = unserialize($str);$student->say();