<?phpclass test{ public $x=1; public $setting; //负责生成其他对象的类或方法,这就是工厂模式 public function getSetting(){ if(!$this->setting){ $this->setting=new Setting(); } return $this->setting; }}class Setting{ public function __construct(){ echo 1111; }}$test=new test();$setting=$test->getSetting();$setting2=$test->getSetting(); //判断两个对象是否是同一个对象var_dump($setting===$setting2);//看编号,也能看出来var_dump($setting);var_dump($setting2); //属性中有减号的处理$name="x-b";$test->$name=2; var_dump($test); //$test->x-b;//直接使用上面的属性,会被认为是一个减号/*报错:PHP Notice: Use of undefined constant b - assumed 'b' in D:/phpServer/WWW/test/test.php on line 11 Notice: Use of undefined constant b - assumed 'b' in D:/phpServer/WWW/test/test.php on line 11 */ echo $test->{'x-b'}; //这种属性里面有-的这样包一下
