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 class=""><SPAN> </SPAN><LI class=alt><SPAN> function __construct() { </SPAN><LI class=""><SPAN> echo "a"; </SPAN><LI class=alt><SPAN> } </SPAN><LI class=""><SPAN>} </SPAN><LI class=alt><SPAN>class b extends a{ </SPAN><LI class=""><SPAN> function __construct(){ </SPAN><LI class=alt><SPAN> </SPAN><LI class=""><SPAN> echo "b"; </SPAN><LI class=alt><SPAN> } </SPAN><LI class=""><SPAN> </SPAN><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></SPAN><LI class=""><SPAN> public static function getx(){ </SPAN><LI class=alt><SPAN> </SPAN><LI class=""><SPAN> return $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>x; </SPAN></SPAN><LI class=alt><SPAN> } </SPAN><LI class=""><SPAN>} </SPAN><LI class=alt><SPAN>$</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></SPAN><LI class=""><SPAN>echo $x-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>getx(); </SPAN></SPAN></LI></OL>结果是:
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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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