use strict;
my $str = '<p><img src="http://cdn03.XXXXXX.de/upload2/Q/m/QmOJ0Li2UbIl143705410063P4391.png"></p>
<p><img src="http://cdn02.XXXXXX.de/upload2/i/Q/iQtReUOqw1Jf143705410914P4391.gif"></p>
<p><img src="http://cdn03.XXXXXX.de/upload2/5/D/5Dse28yAh160143705411823P4391.jpg"></p>';
my $regex = qr/src="(http:\/\/|https:\/\/)(\S*\.(gif|png|jpg|jpeg))"/ip;
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