PHP 多维数组排序

PHP 封装多维数组排序函数

function allKeySort(&$array){
    if(!is_array($array)){
        return;
    }
    $keys = array_keys($array);
    sort($keys);
    $sortedArray = array();
    foreach($keys as $key){
        $sortedArray[$key] = $array[$key];
        allKeySort($sortedArray[$key]);
    }
    $array = $sortedArray;
}

$arr = array(
    'd' => array('h1' => 2, 's2' => 1),
    'b' => array('b1' => 3, 'a2' => 4),
    'c' => array('f1' => 5, 'a2' => 6)
);
allKeySort($arr);
var_dump($arr);

//返回
//Array ( [b] => Array ( [a2] => 4 [b1] => 3 ) [c] => Array ( [a2] => 6 [f1] => 5 ) [d] => Array ( [h1] => 2 [s2] => 1 ) )