phpbb/phpbb3 — pull request #767 by p (2012-04-19 21:08:23+00:00)
Title: [ticket/10813] Installer now checks json extension

Installer now checks json extension and cannot continue without it.
Changes are made in phpBB/install/install_install.php where the
checking for json is added and to phpBB/language/en/install.php where
2 new keys for the messages that would be displayed are also added.

PHPBB3-10813