找不到PHP文件？

So I'm attempting to use include. Here's my index.php

<?php
include ("r.php");
?>

As you can see it simply includes r.php. And here's my r.php

<?php
echo "This is the included code";
?>

This is where the files are both located

So when I run index.php I get

PHP Warning: include(r.php): failed to open stream: No such file or directory in - on line 2 PHP Warning: include(): Failed opening 'r.php' for inclusion (include_path='.:') in - on line 2

I've also tried include "r.php";, note the parentheses, but I'd still get the same error. Any ideas?

Try using the absolute path for r.php and that should work

Use this to include the file relative to the current file:

include ($_SERVER['DOCUMENT_ROOT'] . DIRECTORY_SEPARATOR . 'r.php');

Also, make sure that the webserver has permission to view that file.

Edit: Use abolute path

Try finding your current working directory. Then appending the source code path and then your file. Keep in mind directory separators are different for different OS's

$ds = "\\"; // if your on a windows machine
include(getcwd().$ds.$sourceCodeDirPath.$ds."r.php");