详解PHP 二维数组排序保持键名不变

<?php
$data = array(
 1001 => array(
 'age' => 22,
 'name' => '鸠摩智'
 ),
 1007 => array(
 'age' => 21,
 'name' => '慕容复'
 ),
 1004 => array(
 'age' => 27,
 'name' => '乔帮主'
 )
);
//根据字段age对数组$data进行升序排列 

$ages = array_column($data, 'age'); 

array_multisort($ages, SORT_ASC, $data); 

print_r($data);

$data = array(
 1001 => array(
 'age' => 22,
 'name' => '鸠摩智'
 ),
 1007 => array(
 'age' => 21,
 'name' => '慕容复'
 ),
 1004 => array(
 'age' => 27,
 'name' => '乔帮主'
 )
);
//根据字段age对数组$data进行降序排列
$data = arraySort($data, "age", "desc" );
print_r($data);

/**
 * @desc arraySort php二维数组排序 按照指定的key 对数组进行自然排序
 * @param array $arr 将要排序的数组
 * @param string $keys 指定排序的key
 * @param string $type 排序类型 asc | desc
 * @return array
 */
function arraySort($arr, $keys, $type = 'asc')
{
 $keysvalue = $new_array = array();
 foreach ($arr as $k => $v) {
 $keysvalue[$k] = $v[$keys];
 }

 if ($type == 'asc') {
 natsort($keysvalue);
 }
 if ($type == 'desc') {
 natsort($keysvalue);
 $keysvalue = array_reverse($keysvalue, TRUE); // 将原数组中的元素顺序翻转,如果第二个参数指定为 true，则元素的键名保持不变
 }
 foreach ($keysvalue as $k => $v) {
 $new_array[$k] = $arr[$k];
 }
 return $new_array;
}

/**
 * @desc arraySort php二维数组排序 按照指定的key 对数组进行自然排序
 * @param array $arr 将要排序的数组
 * @param string $keys 指定排序的key
 * @param string $type 排序类型 asc | desc
 * @return array
 */
function arraySort($arr, $keys, $type = 'asc')
{
 $keysvalue = $new_array = array();
 foreach ($arr as $k => $v) {
 $keysvalue[$k] = $v[$keys];
 }

 $type == 'asc' ? asort($keysvalue) : arsort($keysvalue);
 foreach ($keysvalue as $k => $v) {
 $new_array[$k] = $arr[$k];
 }
 return $new_array;
}