use strict;
my $str = 'fff https://stackoverflow.com<br><br>bar https://stackoverflow.com. <br>foo<br>1. //ok// - bar. //ok// - bar. //ok// - foo. //ok// - bar<br>6. //ok// -((https://stackoverflow.com)), ok (((https://stackoverflow.com bar))), fooo/ bar<br> //ok (https://stackoverflow.com bar))).//<br> foo (((https://stackoverflow.com foo)) - ';
my $regex = qr/(?<!https?:)\/\/(.+?)(?<!https?:)\/\//mip;
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