array(4) {
  [0]=>
  array(3) {
    ["name"]=>
    string(6) "赵云"
    ["age"]=>
    int(18)
    ["height"]=>
    float(1.8)
  }
  [1]=>
  array(3) {
    ["name"]=>
    string(6) "张飞"
    ["age"]=>
    int(25)
    ["height"]=>
    float(1.6)
  }
  [2]=>
  array(3) {
    ["name"]=>
    string(6) "刘备"
    ["age"]=>
    int(27)
    ["height"]=>
    float(1.7)
  }
  [3]=>
  array(3) {
    ["name"]=>
    string(6) "关羽"
    ["age"]=>
    int(29)
    ["height"]=>
    float(1.6)
  }
}