PHP mysqli_insert_id（）函数，不带insert

PHP mysqli_insert_id（）函数

此代码打印w3school.com中的最后一个ID：

<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
  {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }

mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age) 
VALUES ('Glenn','Quagmire',33)");

// Print auto-generated id
echo "New record has id: " . mysqli_insert_id($con); 

mysqli_close($con);
?>

---

但似乎这是错误的

只需选择

MAX

id-

 $sql = "SELECT MAX(id) FROM Articls";

“从Articls中选择最大（id）作为id”请看这里：
 $sql = "SELECT MAX(id) FROM Articls";