How to fix this error:
Fatal error: call to undefined function ctype_alnum () in /Applications/AMPPS/www/farhom.com/magento18/lib/Zend/Uri.php on line 109
I tried to run Magento on Ampps on Mac OS X.
Open the Ampps application → PHP tab → PHP extension → select “ctype” → Apply.
Restart the Apache server.
Answer forum
Make sure the ctype package is installed; It is usually installed by default, but some distributions exclude it.
For alpine:
apk add php7-ctype