File composer-autoload.php of Package composer
<?php
$vendorDir = '/usr/share/php';
require_once $vendorDir . '/Symfony/Component/ClassLoader/UniversalClassLoader.php';
use Symfony\Component\ClassLoader\UniversalClassLoader;
$loader = new UniversalClassLoader();
$loader->registerNamespaces(array(
'Seld\\JsonLint' => $vendorDir,
'Seld\\PharUtils' => $vendorDir,
'Seld\\CliPrompt' => $vendorDir,
'JsonSchema' => $vendorDir,
'Symfony\\Component\\Console' => $vendorDir,
'Symfony\\Component\\Finder' => $vendorDir,
'Symfony\\Component\\Process' => $vendorDir,
'Symfony\\Component\\ClassLoader' => $vendorDir,
'Composer' => dirname(__DIR__)
));
$loader->register();