<?php 加載類//include("./Ren.class.php");//include "./Ren.class.php";include_once("./Ren.class.php");include_once("./Ren.class.php");$f = new Ren();$f->test();require("./Ren.class.php");require_once("./Ren.class.php");require_once "./Ren.class.php";$f = new Ren();$f->test(); 自動加載類//1.所有類文件名和類名要保持一致//2.所有類文件放在同一文件下//3.所有類文件命名規則一致function __autoload($cname){ require_once("./$cname.class.php"); }$t = new test();$t->ceshi().'<br>';$s = new Ren();$s->test();兩種魔術方法 class Ren{ public $name; public function say(){  echo "輸出對象方法";  } //輸出對象的方法 public function __tostring(){  echo "另一種輸出方法"; //echo $s->__tostring();  return "另一種輸出方法";//echo $s; } //克隆對象的方法 public function __clone(){  $this->name = "Riven";//$this代表復本（克隆的對象） }} $s = new Ren();//echo $s->__tostring();//輸出字符串//$s->say();$s->name = "小V";var_dump($s);$s1 = clone $s;var_dump($s1);?>