using last inserted id how to select values in php 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: mysql get this inserted id php

$this_id = mysqli_insert_id($db);