二维数组根据某个键的值进行排序

当数组结构复杂,又需要根据某个键的值进行排序的时候是一件比较麻烦的事,下面是一个比较实用的方法.

$arrUsers = array(
    array(
                 'id'   => 1,
             'name' => '张三',
             'age'  => 25,
     ),
     array(
                 'id'   => 2,
             'name' => '李四',
             'age'  => 23,
     ),
     array(
                 'id'   => 3,
             'name' => '王五',
            'age'  => 40,
     ),
     array(
                 'id'   => 4,
             'name' => '赵六',
             'age'  => 31,
     ),
     array(
                 'id'   => 5,
             'name' => '黄七',
             'age'  => 20,
     ),
 );

$sort = array(
    'direction' => 'SORT_ASC', //排序顺序标志 SORT_DESC 降序；SORT_ASC 升序
    'field'     => 'age',       //排序字段
);
$arrSort = array();
foreach($arrUsers AS $uniqid => $row){
    foreach($row AS $key=>$value){
        $arrSort[$key][$uniqid] = $value;
    }
}
if($sort['direction']){
    array_multisort($arrSort[$sort['field']], constant($sort['direction']), $arrUsers);
}

 var_dump($arrUsers);