When i include a file in like 1/2/3/file.php and in the file i do <?php include ('../file2.php'); ?> it sends me to : 1/2/3/../file2.php
it should just send me to ../file2.php. It seems like it does not use the ../ . Also the file does exist.
try to use __DIR__
<?php include (__DIR__.'../file2.php'); ?>