Positive Lookahead(?=config environment="PROD") config environment="PROD"the literal text config environment="PROD" (case sensitive) .*any character (except for line terminators), repeated any number of times
\s*any whitespace character, repeated any number of times
<URL>the literal text <URL> (case sensitive) Negated Character Class[^<]* *matches any number of characters outside the set below:
<the literal < (6010 / 748 / 3C16)
<the literal < (6010 / 748 / 3C16)
\/the literal / (4710 / 578 / 2F16)
URL>the literal text URL> (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