php数组排序和分割字符串

 1 function sortStr($str){
 2 
 3     $ary = str_split($str);
 4     sort($ary);
 5     $len = count($ary);
 6 
 7     $arr = array();
 8     for($i=0; $i<$len; $i++){
 9         $n = ceil($i/2);
10         $k = ($i % 2 == 0) ? $len-1-$n : $n-1;
11         $arr[] = $ary[$k];
12     }
13 
14     return $arr;
15 }
16 
17 $str = '952164387';
18 print_r(sortStr($str));

// 输出结果

 1 Array
 2 (
 3     [0] => 9
 4     [1] => 1
 5     [2] => 8
 6     [3] => 2
 7     [4] => 7
 8     [5] => 3
 9     [6] => 6
10     [7] => 4
11     [8] => 5
12 )
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原文地址：https://www.cnblogs.com/intval/p/3574237.html