<?php

include 'foo.php';
include_once 'foo.php';
require 'foo.php';
require_once 'foo.php';
echo 'foo';

include('bar.php');
include_once('bar.php');
require('bar.php');
require_once('bar.php');
echo('bar');

include ('baz.php');
include_once ('baz.php');
require ('baz.php');
require_once ('baz.php');
echo ('baz');
~~~~~~~~~~
warning:9:8
warning:10:13
warning:11:8
warning:12:13
warning:13:5
warning:15:9
warning:16:14
warning:17:9
warning:18:14
warning:19:6
~~~~~~~~~~
<?php

include 'foo.php';
include_once 'foo.php';
require 'foo.php';
require_once 'foo.php';
echo 'foo';

include 'bar.php';
include_once 'bar.php';
require 'bar.php';
require_once 'bar.php';
echo 'bar';

include 'baz.php';
include_once 'baz.php';
require 'baz.php';
require_once 'baz.php';
echo 'baz';