use strict;
my $str = '[spoiler]content[/spoiler], [spoiler=option]content[/spoiler] and [spoiler="option"]content[/spoiler]
[a] foo [b] bar [/b] baz [/a]
[a=foo] foo [b] bar [/b] baz [/a]
[a="foo"] foo [b] bar [/b] baz [/a]
';
my $regex = qr~\[
(?<tag>\w+) \s*
(?:=\s*
(?:
(?<quote>["']) (?<arg>.{0,100}?) \k<quote>
| (?<arg>[^\]]+)
)
)?
\]
(?<content>
(?:[^[]++ | (?R) )*+
)
\[/\k<tag>\]~xip;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html