Question

I put phpexcel to /silex/vendor/

index.php:

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

$app = new Silex\Application();
$app->register(new Silex\Provider\PHPExel());
$app->get('/hello', function() {
    $objPHPExcel = \PHPExcel::newInstance();
    $objPHPExcel = $objReader->load('123.xls');
    return 'Hello!';
});

$app->run();

Fatal error: Class 'Silex\Provider\PHPExel' not found

Answer 1

you can install PHPexcel via composer, see https://github.com/ddeboer/phpexcel.
To use PHPExcel via composer simply create a new instance in your code:

$phpExcel = new \PHPExcel();