documentation/magento2-base_2setup_2index_8php_source.html

 <?php
 use Magento\Setup\Application;
 use Magento\Setup\Model\ObjectManagerProvider;

 if (PHP_SAPI == 'cli') {
     echo "You cannot run this from the command line." . PHP_EOL .
         "Run \"php bin/magento\" instead." . PHP_EOL;
     exit(1);
 }
 try {
     require __DIR__ . '/../app/bootstrap.php';
 } catch (\Exception $e) {
     echo <<<HTML
 <div style="font:12px/1.35em arial, helvetica, sans-serif;">
     <div style="margin:0 0 25px 0; border-bottom:1px solid #ccc;">
         <h3 style="margin:0;font-size:1.7em;font-weight:normal;text-transform:none;text-align:left;color:#2f2f2f;">
         Autoload error</h3>
     </div>
     <p>{$e->getMessage()}</p>
 </div>
 HTML;
     exit(1);
 }

 // For Setup Wizard we are using our customized error handler
 $handler = new \Magento\Framework\App\ErrorHandler();
 set_error_handler([$handler, 'handler']);

 $configuration = require __DIR__ . '/config/application.config.php';
 $bootstrap = new Application();
 $application = $bootstrap->bootstrap($configuration);
 $application->getServiceManager()
     ->get(ObjectManagerProvider::class)
     ->setObjectManager(\Magento\Framework\App\Bootstrap::create(BP, $_SERVER)->getObjectManager());
 $application->run();
Magento\Setup\Model\ObjectManagerProvider
Definition: ObjectManagerProvider.php:22

Magento\Framework\App

$configuration
$configuration
Definition: index.php:33

__DIR__
defined('TESTS_BP')||define('TESTS_BP' __DIR__
Definition: _bootstrap.php:60

$application
$application
Definition: index.php:35

exit
exit
Definition: redirect.phtml:12

Magento

BP
const BP
Definition: autoload.php:14

Magento\Setup\Application
Definition: Application.php:16

$bootstrap
catch(\Exception $e) $bootstrap
Definition: index.php:36

$handler
catch(\Exception $e) $handler
Definition: index.php:30