I'm Moodle development beginner, I installed Moodle 3.4 source code in NetBeans / Ubuntu 16.4 and it works every well.
However i want modify the Moodle File System for purpose of moving the file folder ../moodledata/filedir to remote computer.
So i tried to do following instruction in this link, doing exactly what is in the example of using FTP for Moodle File System
However I start moodle and it throw: "Exception - Class '\core_file_system_ftp' not found"
I also change the line in config.php
$CFG->alternative_file_system_class = '\\core_file_system_ftp';
$CFG->alternative_file_system_class = 'core_file_system_ftp';
then it throw
"Exception - Class 'core_file_system_ftp' not found"
I checked many things about Moodle automatic class loading... but it still show this exception. Googling 2 days but help not found.
Could anyone help me ?
Thank you and best regards