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php 简单洗牌算法

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Release: 2016-06-13 09:42:28
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来源: http://phpman.cn/?p=37 
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view source print? 01 <?php 02 /** 03  * @author     phpman.cn 04  * @date       2012/12/04 05  * @todo       简单洗牌算法 06  */ 07   08 <code class="variable">$card_num=54; //牌数 09 print_r(wash_card(<code class="variable">$card_num)); 10   11 function wash_card(<code class="variable">$card_num) 12 { 13     $cards=$tmp=array(); 14     for($i=0;$i<code class="variable">$card_num;$i++){ 15         $tmp[$i]=$i; 16     } 17   18     for($i=0;$i<code class="variable">$card_num;$i++){ 19         $index=rand(0,<code class="variable">$card_num-$i-1); 20         $cards[$i]=$tmp[$index]; 21         unset($tmp[$index]); 22         $tmp=array_values($tmp); 23     } 24     return $cards; 25 } 26 ?>
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