how to get last id in database code example

Example 1: mysql get the last id php

// Insert query 
$query = "insert into users(username,fname,lname) values('sonarika','Sonarika','Bhadoria')"; 

mysqli_query($con,$query); 

// Get last insert id 
$lastid = mysqli_insert_id($con);

Example 2: how to get last id in database

$db = db_connect();
  $query = $db->query("SELECT * FROM users ORDER BY id DESC LIMIT 1");
  $result = $query->getRow();