get logged in user wordpress code example

Example 1: wp get logged in user id

<?php
	$user_id = get_current_user_id();
?>

Example 2: if user logged in wordpress

if ( is_user_logged_in() ) {
   // your code for logged in user 
} else {
   // your code for logged out user 
}

Example 3: wordpress get username

$current_user = wp_get_current_user();
echo($current_user->user_login);