{"id":149,"title":"\u91cd\u5199","good":0,"bad":0,"hit":2551,"created_at":"2015-01-12 15:50:33","content":"<p>\u5f53\u5b58\u5728\u7ee7\u627f\u65f6\uff0c\u5982\u679c\u4e24\u4e2a\u7c7b\u4e2d\u5b58\u5728\u540c\u540d\u7684\u5c5e\u6027\u6216\u8005\u65b9\u6cd5\u65f6\uff0c\u4f1a\u53d1\u751f\u91cd\u5199\uff1b<\/p><p>\u5982\u679c\u5b50\u7c7b\uff0c\u4e0e\u7236\u7c7b\uff0c\u51fa\u73b0\u540c\u540d\u7684\u6210\u5458\uff08\u5c5e\u6027\u65b9\u6cd5\uff09\uff0c\u5219\u5728\u5b9e\u4f8b\u5316\u5b50\u7c7b\u5bf9\u8c61\u65f6\uff0c\u53ea\u4f1a\u5f97\u5230\u5b50\u7c7b\u4e2d\u5b9a\u4e49\u7684\u6210\u5458\uff0c\u79f0\u4e4b\u4e3a\u91cd\u5199\uff01<\/p><p>\u4e00\u65e6\u91cd\u5199\uff0c\u7236\u7c7b\u4ee3\u7801\u5c31\u4e0d\u4f1a\u5728\u6267\u884c\u4e86\uff01<\/p><p><br\/><\/p><p>&lt;?php<br\/><br\/>class A{<br\/>&nbsp;&nbsp; &nbsp;public function f1(){<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;echo 1;<br\/>&nbsp;&nbsp; &nbsp;}<br\/>}<br\/><br\/>class B extends A{<br\/>&nbsp;&nbsp; &nbsp;public function f1(){<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;echo 2;<br\/>&nbsp;&nbsp; &nbsp;}<br\/>}<br\/><br\/><br\/>$o=new B();<br\/>$o-&gt;f1();\/\/2<br\/><br\/>?&gt;<\/p><p>&nbsp;<\/p><p>\u4f46\u662f\u6709\u4e9b\u65b9\u6cd5\u662f\u4e00\u5b9a\u4f1a\u91cd\u5199\u7684\uff01<\/p><p>\u600e\u6837\u624d\u80fd\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u5462\uff1f<\/p><p>&nbsp;<\/p><p>parent\uff0c\u5173\u952e\u5b57\uff0c\u8868\u793a\u7236\u7c7b\u7684\u610f\u601d\uff01\u7528\u4e8e\u5728\u5f53\u524d\u7c7b\u4e2d\uff0c\u5f3a\u5236\u8c03\u7528\u7236\u7c7b\u6210\u5458\uff01<\/p><p>\u5178\u578b\u7684\u505a\u6cd5\uff0c\u5c06\u53c2\u6570\u4f20\u9012\u5230\u5b50\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4e2d\uff0c\u518d\u5728\u5b50\u7c7b\u4e2d\uff0c\u5f3a\u5236\u4f7f\u7528parent\u5173\u952e\u5b57\uff0c\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5<\/p><p>&lt;?php<br\/><br\/><br\/><br\/><br\/>class A{<br\/>&nbsp;&nbsp; &nbsp;public $name;<br\/>&nbsp;&nbsp; &nbsp;public function __construct($name){<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;$this-&gt;name=$name;<br\/>&nbsp;&nbsp; &nbsp;}<br\/>}<br\/><br\/>class B extends A{<br\/>&nbsp;&nbsp; &nbsp;public $sex;<br\/>&nbsp;&nbsp; &nbsp;public function __construct($name,$sex){<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;<strong>parent::__construct($name);<\/strong><br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;$this-&gt;sex=$sex;<br\/>&nbsp;&nbsp; &nbsp;}<br\/>}<br\/><br\/><br\/>$o=new B(&#39;tom&#39;,&#39;man&#39;);<br\/>echo $o-&gt;name.&#39;,&#39;.$o-&gt;sex;\/\/tom,man<br\/><br\/>?&gt;<\/p><p><br\/><\/p><p>\u6ce8\u610f\uff1aself\uff0cparent\uff0c$this\u7684\u533a\u522b\uff1a<\/p><p>self:: \u5f53\u524d\u7c7b\u672c\u8eab<\/p><p>parent:: \u5f53\u524d\u7c7b\u7236\u7c7b<\/p><p>$this-&gt; \u5f53\u524d\u5bf9\u8c61\u3002<br\/><\/p>"}