复制代码 代码如下:
<?php
$arr = array(1,2,3,4,5);

$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 "<pre>";
$total++;
}
return;
}
format($new_arr,$index+1,$arr);
$new_arr[] = $arr[$index];
format($new_arr,$index+1,$arr);
}

echo "<pre>";
print_r($b);
echo "</pre>";