$arr=[
    array(
        ‘name‘=>‘小坏龙‘,
        ‘age‘=>28
    ),
    array(
        ‘name‘=>‘小坏龙2‘,
        ‘age‘=>14
    ),
    array(
        ‘name‘=>‘小坏龙3‘,
        ‘age‘=>59
    ),
    array(
        ‘name‘=>‘小坏龙4‘,
        ‘age‘=>23
    ),
    array(
        ‘name‘=>‘小坏龙5‘,
        ‘age‘=>23
    ),
    array(
        ‘name‘=>‘小坏龙6‘,
        ‘age‘=>21
    ),
];

array_multisort(array_column($arr,‘age‘),SORT_DESC,$arr);
print_r($arr);