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                ### 入門案例類: ~~~ <?php ? //面向對象 //構造一個類 cat() ? class cat{ ? ? ? public $name; public $age; public $color; } //創建對象(通過一個cat類創建一個cat對象 $cat1= new cat(); $cat1->name="小白"; $cat1->age=3; $cat1->color="白色"; $cat2= new cat(); $cat2->name="小花"; $cat2->age=4; $cat2->color="黑色"; //如果我們找到一只貓,去匹配他任何一個屬性都能獲得他的其他屬性 $findname="小白"; if($cat1->name == $findname){ ? ? ? echo $cat1->name."&nbsp;".$cat1->age."&nbsp;".$cat1->color; } ?> ~~~ ### 類和對象的關系 ![](https://box.kancloud.cn/2016-06-03_5750fd8dc38ec.jpg) ### 類和對象的區別: 1、類是抽象的,概念的,代表一類事物,如人類,貓類。 2、對象時具體的,實際的,代表一個具體的事物。 3、類是對象的模板,對象時類的一個個體實例。 ? ### 對象在內存中存在的形式: ![](https://box.kancloud.cn/2016-06-03_5750fd8ddc3af.jpg) ### 類的成員方法: ?下面是一個簡單是實例,介紹類測成員方法的運用。 ~~~ <?php class computer{ public $name; public $type; //成員方法 public function open(){ echo "open the conmputer!<br/>"; } public function computersleep(){ echo "slepp the computer! <br/>"; } public function close(){ echo "close the computer!<br/>"; } } ?> ~~~ ~~~ <?php //導入類 require_once "computer_class.php"; //創建一個對象 $com=new computer(); $com->open(); $com->computersleep(); $com->close(); ?> ~~~
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