体育彩票排列三组选三算法分享

复制代码 代码如下:

function arrange($arr){
$new_arr = array();
$c = count($arr);
foreach($arr as $key=>$vo){
  $lin = $arr;
  array_splice($lin,$key,1);
    for($l=0;$l<$c-1;$l++){
   $larr = array();
   $larr[] = $lin[$l];
   $larr[] = $vo;
   $larr[] = $vo;
   $new_arr[] = $larr;
    }
 }
 return $new_arr;
}
$arr = array(1,2,3,4);
$r = arrange($arr);
print_r($r);

得到的结果是：

复制代码 代码如下:

Array
(
[0] => Array
(
[0] => 2
[1] => 1
[2] => 1
)

[1] => Array
(
[0] => 3
[1] => 1
[2] => 1
)

[2] => Array
(
[0] => 4
[1] => 1
[2] => 1
)

[3] => Array
(
[0] => 1
[1] => 2
[2] => 2
)