Update.php does nothing I'm trying to do a minor security upgrade to Drupal 8.1.7  When I load update.php it gives me a blank page (no errors).

I upgraded all of the software with the exception of the root .htaccess and robots.txt files.

I'm getting this error:


  PHP Parse error:  syntax error, unexpected T_STRING, expecting T_CONSTANT_ENCAPSED_STRING or '(' in /home/energy/public_html/index.php on line 11


The line causing the error is the following one.

use Drupal\Core\DrupalKernel;
Drupal 8 requires PHP 5.5.9. If you are using PHP 5.2.9, it doesn't recognize as valid a line like use Drupal\Core\DrupalKernel; since namespaces were introduced in PHP 5.3.

If you were already running a stable release of Drupal 8 before, check you didn't change in someway the PHP version used from your site.