<athe literal text <a (case sensitive) .*?any character (except for line terminators), repeated any number of times
data-extra-url="the literal text data-extra-url=" (case sensitive) .*?any character (except for line terminators), repeated any number of times
<the literal < (6010 / 748 / 3C16)
\/the literal / (4710 / 578 / 2F16)
a>the literal text a> (case sensitive) g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string