I tried to use parse_url to decode the DSN and noticed a strange behavior. The following is an example DSN:

parse_url('redis://localhost'); //Correctly parses
parse_url('file:///var/sessions'); //Correctly parses
parse_url('redis:///var/run/redis.sock'); //Parse error
parse_url('file:///var/run/redis.sock'); //Correctly parses

Looks like it can't resolve urls without a host, except for the file scenario.

Did I miss something?

Is there a way to disable this behavior?