^start of line
Negative Lookahead(?!.*context) .*any character (except for line terminators), repeated any number of times
contextthe literal text context (case sensitive) .*any character (except for line terminators), repeated any number of times
\ban ASCII word boundary
Non-Capturing Group(?:user|member) userthe literal text user (case sensitive) memberthe literal text member (case sensitive) \.the literal . (4610 / 568 / 2E16)
phpthe literal text php (case sensitive) .*any character (except for line terminators), repeated any number of times
$end of line
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