PHP二维数组根据某个字段排序

//原二维数组

$arr = array{

array(3) {
  [0] => array(4) {
    ["id"] => int(1)
    ["name"] => string(6) "张三"
    ["age"] => int(25)
    ["rank"] => int(90)
  }
  [1] => array(4) {
    ["id"] => int(2)
    ["name"] => string(6) "李四"
    ["age"] => int(23)
    ["rank"] => int(80)
  }
  [2] => array(4) {
    ["id"] => int(3)
    ["name"] => string(6) "王五"
    ["age"] => int(40)
    ["rank"] => int(70)
  }
}

}

//取出要排序的键的值  http://www.w3school.com.cn/php/func_array_column.asp

$rank = array_column($arr,"rank");

//按键值排序  http://www.w3school.com.cn/php/func_array_multisort.asp

array_multisort($rank,$arr);

//结果

array(3) {
  [0] => array(4) {
    ["id"] => int(3)
    ["name"] => string(6) "王五"
    ["age"] => int(40)
    ["rank"] => int(70)
  }
  [1] => array(4) {
    ["id"] => int(2)
    ["name"] => string(6) "李四"
    ["age"] => int(23)
    ["rank"] => int(80)
  }
  [2] => array(4) {
    ["id"] => int(1)
    ["name"] => string(6) "张三"
    ["age"] => int(25)
    ["rank"] => int(90)
  }
}