PHP5面向对象的一些问题反映
- WBOYOriginal
- 2016-06-13 11:05:271271browse
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。
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