快速排序

<?<span style="color: #000000;">php
</span><span style="color: #008080;">header</span>("content-type:text/html;charset=utf-8"<span style="color: #000000;">);
</span><span style="color: #008000;">//</span><span style="color: #008000;">快速排序(不要求)//有问题</span>
<span style="color: #800080;">$array</span>=<span style="color: #0000ff;">array</span>(0,5,-1,98,-35<span style="color: #000000;">);
</span><span style="color: #008000;">//</span><span style="color: #008000;">动态的创建200000个数据,不要打出，机器会死掉！</span><span style="color: #008000;">
/*</span><span style="color: #008000;">for($i=0;$i<200000;$i++){
      $array[$i]=rand(0,3000);
}
</span><span style="color: #008000;">*/</span>
<span style="color: #0000ff;">function</span> quickSort(<span style="color: #800080;">$left</span>,<span style="color: #800080;">$right</span>,&<span style="color: #800080;">$array</span><span style="color: #000000;">){
   </span><span style="color: #800080;">$l</span>=<span style="color: #800080;">$left</span><span style="color: #000000;">;
   </span><span style="color: #800080;">$r</span>=<span style="color: #800080;">$right</span><span style="color: #000000;">;
   </span><span style="color: #800080;">$pivot</span>=<span style="color: #800080;">$array</span>[(<span style="color: #800080;">$left</span>+<span style="color: #800080;">$right</span>)/2<span style="color: #000000;">];
   </span><span style="color: #800080;">$temp</span>=0<span style="color: #000000;">;
   </span><span style="color: #0000ff;">while</span>(<span style="color: #800080;">$l</span><<span style="color: #800080;">$r</span><span style="color: #000000;">){
         </span><span style="color: #0000ff;">while</span>(<span style="color: #800080;">$array</span>[<span style="color: #800080;">$l</span>]<<span style="color: #800080;">$pivot</span>) <span style="color: #800080;">$l</span>++<span style="color: #000000;">;
         </span><span style="color: #0000ff;">while</span>(<span style="color: #800080;">$array</span>[<span style="color: #800080;">$r</span>]><span style="color: #800080;">$pivot</span>) <span style="color: #800080;">$r</span>--<span style="color: #000000;">;

         </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$l</span>>=<span style="color: #800080;">$r</span>) <span style="color: #0000ff;">break</span><span style="color: #000000;">;

         </span><span style="color: #800080;">$temp</span>=<span style="color: #800080;">$array</span>[<span style="color: #800080;">$l</span><span style="color: #000000;">];
         </span><span style="color: #800080;">$array</span>[<span style="color: #800080;">$l</span>]=<span style="color: #800080;">$array</span>[<span style="color: #800080;">$r</span><span style="color: #000000;">];
         </span><span style="color: #800080;">$array</span>[<span style="color: #800080;">$r</span>]=<span style="color: #800080;">$temp</span><span style="color: #000000;">;

         </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$array</span>[<span style="color: #800080;">$l</span>]==<span style="color: #800080;">$pivot</span>)  --<span style="color: #800080;">$r</span><span style="color: #000000;">;
         </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$array</span>[<span style="color: #800080;">$r</span>]==<span style="color: #800080;">$pivot</span>)  ++<span style="color: #800080;">$l</span><span style="color: #000000;">;
   }
   </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$l</span>==<span style="color: #800080;">$r</span><span style="color: #000000;">){
      </span><span style="color: #800080;">$l</span>++<span style="color: #000000;">;
      </span><span style="color: #800080;">$r</span>--<span style="color: #000000;">;
   }

   </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$left</span><<span style="color: #800080;">$r</span>) quickSort(<span style="color: #800080;">$left</span>,<span style="color: #800080;">$r</span>,<span style="color: #800080;">$array</span><span style="color: #000000;">);
   </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$right</span>><span style="color: #800080;">$l</span>) quickSort(<span style="color: #800080;">$l</span>,<span style="color: #800080;">$right</span>,<span style="color: #800080;">$array</span><span style="color: #000000;">);
}
</span><span style="color: #800080;">$today</span>=<span style="color: #008080;">date</span>('Y-n-d G:i:s'<span style="color: #000000;">);
</span><span style="color: #0000ff;">echo</span> '排序前时间是'.<span style="color: #800080;">$today</span><span style="color: #000000;">;
quickSort(</span>0,<span style="color: #008080;">count</span>(<span style="color: #800080;">$array</span>)-1,<span style="color: #800080;">$array</span><span style="color: #000000;">);
</span><span style="color: #800080;">$today</span>=<span style="color: #008080;">date</span>('Y-n-d G:i:s'<span style="color: #000000;">);
</span><span style="color: #0000ff;">echo</span> '排序后时间是'.<span style="color: #800080;">$today</span><span style="color: #000000;">;
</span><span style="color: #0000ff;">echo</span> "<br/>";