PHP的mysqli_fetch_all

MYSQLI_NUM键值为数字：丢失了原来的味道了，key全是数字了，丢失了原味道。

MYSQLI_ASSOC键值为字母 ：还有原来的味道啊，好！！！！拍手，哈哈哈哈~~

query($sql);
$res1=mysqli_fetch_all($res,MYSQLI_NUM);
$res=$conn->query($sql);
$res2=mysqli_fetch_all($res,MYSQLI_ASSOC);

MYSQLI_NUM的

array(2) {
  [0]=>
  array(3) {
    [0]=>
    string(1) "1"
    [1]=>
    string(3) "sun"
    [2]=>
    string(3) "sun"
  }
  [1]=>
  array(3) {
    [0]=>
    string(1) "2"
    [1]=>
    string(2) "li"
    [2]=>
    string(2) "li"
  }
}

MYSQLI_ASSOC的

array(2) {
  [0]=>
  array(3) {
    ["id"]=>
    string(1) "1"
    ["name"]=>
    string(3) "sun"
    ["sex"]=>
    string(3) "sun"
  }
  [1]=>
  array(3) {
    ["id"]=>
    string(1) "2"
    ["name"]=>
    string(2) "li"
    ["sex"]=>
    string(2) "li"
  }
}