Grep Search all files in directory for string1 AND string2

Question

How can I make use of grep in cygwin to find all files that contain BOTH words.

This is what I use to search all files in a directory recursively fo

Answer 1

grep -r db-connect.php . | grep version

Answer 2

Why to stick to only grep:

perl -lne 'print if(/db-connect.php/&/version/)' *