^start of line
selectthe literal text select (case insensitive) \s+any whitespace character, repeated at least once
.+?any character (except for line terminators), repeated at least once
\s+any whitespace character, repeated at least once
fromthe literal text from (case insensitive) \s+any whitespace character, repeated at least once
\S+any non-whitespace character, repeated at least once
\s*any whitespace character, repeated any number of times
Non-Capturing Group(?:where\s+(?<cnd>[\d\w= ><!]+))? ?repeats the group contents below at most once:
wherethe literal text where (case insensitive) \s+any whitespace character, repeated at least once
Group cnd(?<cnd>[\d\w= ><!]+) Character Class[\d\w= ><!]+ +matches at least one character from the set below:
\da digit
\wany word character
=the literal = (6110 / 758 / 3D16)
the literal (3210 / 408 / 2016)
>the literal > (6210 / 768 / 3E16)
<the literal < (6010 / 748 / 3C16)
!the literal ! (3310 / 418 / 2116)
;?optionally matches the literal ; (5910 / 738 / 3B16)
$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
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters