Class not found when using a package with Netbeans/Composer

Question

I'am using NetBeans IDE 8.2, I created a PHP application and using the composer within the IDE, I installed a package "phpspreadsheet" :

The package is then installed in the vendor folder and I even have the autocompletion when using the package's classes.

But when I run this project, it's throws me this error :

Fatal error: Class 'PhpOffice\\PhpSpreadsheet\\IOFactory' not found in C:\\wamp64\\www\\NetBeansComposer\\index.php on line 5

Is it beacause WAMP can't access the vendor folder? How can I fix this?

Answer 1

require_once __DIR__ . '/vendor/autoload.php';

为我解决了问题。