Question

What would be a basic regular expression which finds some string if given the string quuz="bleh" foo="some string" bar="some other string" where some string and some other string are arbitrary strings.

Answer 1

Any string between quotes:

"([^"]*)"

Any string between quotes called foo:

foo="([^"]*)"

Any string between quotes, handling escaped quotes correctly, i. e. matching 2\" by 4\" in "2\" by 4\"":

"((?:\\.|[^"\\])*)"

In all cases, the overall match includes the surrounding quotes; the capturing group $1 will contain the string you’re interested in. How to access that depends on your regex implementation.