Fatal error on install I have AMPPS installed on my Mac OS X, and am trying to install the CMS. When I browse to http://craft.dev/admin to install, it redirects to http://craft.dev/admin/install with the following error:

Fatal error: Call to undefined function ctype_alpha() in /Users/username/domains/craft.dev/craft/app/vendor/twig/twig/lib/Twig/Lexer.php on line 380


Any suggestions on fixing the issue?
Check that the php ctype extension is installed or enabled.