Positive Lookbehind(?<=<a) <athe literal text <a (case sensitive) .+any character, repeated at least once
\s?optionally matches any whitespace character
hrefthe literal text href (case sensitive) \s*any whitespace character, repeated any number of times
=the literal = (6110 / 758 / 3D16)
\s*any whitespace character, repeated any number of times
"the literal " (3410 / 428 / 2216)
'the literal ' (3910 / 478 / 2716)
.+?any character, repeated at least once
\2the text saved by group 2
g modifier: global. Finds all matches instead of stopping after the first
s modifier: single line. Allows a dot to match line terminators