Problems with accessing files - php

Question

Hello stackoverflow community, how can i solve this problem, here it is my error:
Warning: require_once(DP_BASE_DIR/classes/query.class.php):
failed to open stream: No such file or directory in
the that query.class.php is in the folder:
$_SERVER['DOCUMENT_ROOT']/classes/query.class.php
Im trying to access it from:
$_SERVER['DOCUMENT_ROOT']/modules/tasks/ajax/file.php here.
When i try to use:
require_once($_SERVER['DOCUMENT_ROOT'].'/classes/query.class.php'):
It works like a charm. But i need to acces that file using DP_BASE_DIR. So when i write:
require_once DP_BASE_DIR."/classes/query.class.php";
I get an error. How can i solve this problem?

Answer 1

Try to see if this makes sense to you, I have tested this out using:
test.php
<?php
define('DP_BASE_DIR', '/var/www/devspace');
if (!(defined('DP_BASE_DIR'))) { die('This file should not be called directly.'); }
require DP_BASE_DIR."/test2.php";
var_dump($string);exit;
// outputs string(4) "test"
?>
test2.php
<?php
$string = 'test';
?>
Isn't that exactly what you're doing? I feel that something else is coming into play here and being left out of the info that has been provided.
The only real issue that I could spot here is that maybe $_SERVER['DOCUMENT_ROOT'] did not hold the exact same value as your DP_BASE_DIR but as you have confirmed these to be the same I am scratching my head about other possibilities as this should just work.
EDIT:
do this right before the require:
$test = DP_BASE_DIR."/classes/query.class.php";
var_dump($test);exit;
Post the result?

Answer 2

Warning: require_once(DP_BASE_DIR/classes/query.class.php):
failed to open stream: No such file or directory in
Seems DP_BASE_DIR constant does not exists. If constant does not exists will use the name of constant, and you get a notice.
define("CONSTANT", "Hello world.");
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Constant" and issues a notice.