按最大值對數組排序

Question

我想按排序的最高值排序我的數組順序。

這是一個JSON數據

"score":[ 
    { 
     "userId":"5", 
     "playtime":"1396369254", 
     "score":"25" 
    }, 
    { 
     "userId":"1", 
     "playtime":"1396369056", 
     "score":"12" 
    }, 
    { 
     "userId":"2", 
     "playtime":"1396369240", 
     "score":"100" 
    } 
], 

這裏得分100將

Answer 1

使用PHP的功能usorthttp://www.php.net/manual/en/function.usort.php

function cmp($a, $b) 
{ 
    if ($a['score'] == $b['score']) { 
     return 0; 
    } 
    return ($a['score'] < $b['score']) ? -1 : 1; 
} 

usort($DATA, "cmp");