二维数组排序

$data = array(

  array(

    'id' => 5698,

    'first_name' => 'Bill',

    'last_name' => 'Gates',

  ),

  array(

    'id' => 4767,

    'first_name' => 'Steve',

    'last_name' => 'Aobs',

  ),

  array(

    'id' => 3809,

    'first_name' => 'Mark',

    'last_name' => 'Zuckerberg',

  )

);

//根据字段last_name对数组$data进行降序排列

$last_names = array_column($data,'last_name');

array_multisort($last_names,SORT_DESC,$data);

var_dump($data);