Question

Hey So I am not good with regex right now, trying to learn though, can someone explain this one out for me bit by bit?

if ($fileStrings[$stringCount] =~ m/((?:include|require)(?:_once)?\s*\(.*?\$.*?\);)/gi)

Thanks

Answer 1

m/((?:include|require)(?:_once)?\s*(.?\$.?);)/gi

m match for

/ pattern delimiter

(?:include|require) match but not capture ‘include’ or ‘require’

(?:_once)? optionally match for but not capture ‘_once’

\s* 0 or more spaces or tabs, other “whitespace” characters

(.?\$.?) match and capture 0 or 1 of any character, followed by literal $ character,
followed by 0 or 1 of any character

; match for semicolon

(...) outer parenthesis – capture whole thing

/ pattern delimiter

gi global, case-insensitive search