PHP5面向对象的一些问题反映_PHP教程

大家也许对好了，先将代码贴出来

<ol class="dp-xml">
<li class="alt"><span><span>class a {     </span></span></li>
<li class=""><span>    </span></li>
<li class="alt"><span>    function __construct() {     </span></li>
<li class=""><span>        echo "a";     </span></li>
<li class="alt"><span>    }     </span></li>
<li class=""><span>}     </span></li>
<li class="alt"><span>class b extends  a{     </span></li>
<li class=""><span>    function __construct(){     </span></li>
<li class="alt"><span>          </span></li>
<li class=""><span>        echo "b";     </span></li>
<li class="alt"><span>    }     </span></li>
<li class=""><span>         </span></li>
<li class="alt">
<span>    private $</span><span class="attribute"><font color="#ff0000">x</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">100</font></span><span>;     </span>
</li>
<li class=""><span>   public  static  function getx(){     </span></li>
<li class="alt"><span>           </span></li>
<li class="">
<span>      return $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>x;      </span>
</li>
<li class="alt"><span>   }     </span></li>
<li class=""><span>}     </span></li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">x</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">new</font></span><span> b();     </span>
</li>
<li class="">
<span>echo $x-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>getx();    </span>
</li>
</ol>

结果是：

b100

“a”竟然没有输出，真不知到PHP5面向对象里类初始化的顺序。

http://www.bkjia.com/PHPjc/446437.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/446437.htmlTechArticle大家也许对 好了，先将代码贴出来 classa{ function__construct(){ echo"a"; } } classbextendsa{ function__construct(){ echo"b"; } private$ x = 100 ; publicstaticfunction...