[Drupal] 7 Common ways to get through white screen death error in drupal 8

I got assigned with a task of executing drupal-8 migrations. The only way to migrate data into Drupal 8 is through Drush. While I was progressing through working with Drupal-7 to Drupal-8 migration we got stuck with white screen death.

So we find out following are the methods to correct this error.

• Rebuilt site's Dependency Injection Container (DIC).
  Run update.php ,after running also if you got this error try to delete php folder in sites/all/default/files
• Clearing cache
  Try to clear site cache from /admin/config/development/performance
  using drush
  try with drush, a command line for Drupal8

   drush cr

• Checked database is running or not.
• If you have changed any code in your custom module try to reinstall the module
• Try to remove everything in files/php directory.

• May be this error due to settings.php file is already populated but your database is empty.(when you're trying to re-install, and settings.php have no write permissions)

  • Copying default.settings.php over settings.php
  • Give write permission for settings.php
• Check your module missing any required use statements
  for example:

  use Drupal\Component\Utility\String;
   ;;
   String::checkPlain

• Check opcode cache configurations
  OPcache for example requires the following settings,

   php_admin_flag[opcache.load_comments] = on
    php_admin_flag[opcache.save_comments] = on