use strict;
my $str = 'https://market.591.com.tw/?age=_5,10_20&purpose=4§ionId=9&price=70_80,_50';
my $regex = qr/\?((?:(?<rid>regionId)=(?<ridv>[\d\$,_]+)|(?<sid>sectionId)=(?<sidv>(?P>ridv))|(?<a>age)=(?<av>(?P>ridv))|(?<p>purpose)=(?<pv>(?P>ridv))|(?<l>lineId)=(?<lv>(?P>ridv))|(?<stid>stationId)=(?<stidv>(?P>ridv))|(?<pe>price)=(?<pev>(?P>ridv)))&?)+/mp;
if ( $str =~ /$regex/ ) {
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