“Fatal error: Class not found in..”, Composer package not recognized

Question

I ran this call in Putty, it successfully installed the resource:

php composer.phar require --dev \"mikehaertl/php-pdftk:*\"

I

Answer 1

I got the same error when autoload was not called correctly. What solved for me is:

require_once('vendor/autoload.php');

I use this in plain php project,the php page where i use it it is the same folder as the mikehaertl folder. So i am sure that your issue is related to this