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php生成数组的使用示例 php全组合算法_PHP

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Release: 2016-06-01 11:57:29
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复制代码 代码如下:
$arr = array(1,2,3,4,5);
/*
@ res  组装好的每一注的每个元素
@ $a 临时数组
@ $index 数组索引
@ $arr 请求的数组
@ $b 最后要的结果
*/
$a = array();
$b = array();
$total = 0;
format($a,0,$arr);
function format($res,$index,$arr){
 global $total;
 global $b;
 $new_arr = $res;
 $n_arr = array();
 if($index == count($arr)){
  if(count($new_arr)==5){
   $b[]  = $new_arr;
   echo "

";<br>   $total++; <br>  }  <br>  return;<br> }<br> format($new_arr,$index+1,$arr);<br> $new_arr[] = $arr[$index];<br> format($new_arr,$index+1,$arr);<br>}
<p>echo "</p><pre class="brush:php;toolbar:false">";<br>print_r($b);<br>echo "
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";  
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