use strict;
my $str = '<link rel=\'stylesheet\' id=\'social-logos-css\' href=\'https://www.markmallett.com/blog/wp-content/plugins/jetpack/_inc/social-logos/social-logos.min.css?ver=1\' type=\'text/css\' media=\'all\' />
<link rel=\'stylesheet\' id=\'jetpack_css-css\' href=\'https://www.markmallett.com/blog/wp-content/plugins/jetpack/css/jetpack.css?ver=6.5\' type=\'text/css\' media=\'all\' />
<script type=\'text/javascript\' src=\'https://www.markmallett.com/blog/wp-includes/js/jquery/jquery.js?ver=1.12.4\'></script>
<script type=\'text/javascript\' src=\'https://www.markmallett.com/blog/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1\'></script>
<script type=\'text/javascript\' src=\'https://www.markmallett.com/blog/wp-content/plugins/footnotes/class/../js/jquery.tools.min.js?ver=4.9.8\'></script>
<script type=\'text/javascript\' src=\'https://www.markmallett.com/blog/wp-content/plugins/add-to-any/addtoany.min.js?ver=1.0\'></script>
<script type=\'text/javascript\'>
var mejsL10n = {"language":"en","strings":{"mejs.install-flash":"You are using a browser that does not have Flash player enabled or installed. Please turn on your Flash player plugin or download the latest version from https:\\/\\/get.adobe.com\\/flashplayer\\/","mejs.fullscreen-off":"Turn off Fullscreen","mejs.fullscreen-on":"Go Fullscreen","mejs.download-video":"Download Video","mejs.fullscreen":"Fullscreen","mejs.time-jump-forward":["Jump forward 1 second","Jump forward %1 seconds"],"mejs.loop":"Toggle Loop","mejs.play":"Play","mejs.pause":"Pause","mejs.close":"Close","mejs.time-slider":"Time Slider","mejs.time-help-text":"Use Left\\/Right Arrow keys to advance one second, Up\\/Down arrows to advance ten seconds.","mejs.time-skip-back":["Skip back 1 second","Skip back %1 seconds"],"mejs.captions-subtitles":"Captions\\/Subtitles","mejs.captions-chapters":"Chapters","mejs.none":"None","mejs.mute-toggle":"Mute Toggle","mejs.volume-help-text":"Use Up\\/Down Arrow keys to increase or decrease volume.","mejs.unmute":"Unmute","mejs.mute":"Mute","mejs.volume-slider":"Volume Slider","mejs.video-player":"Video Player","mejs.audio-player":"Audio Player","mejs.ad-skip":"Skip ad","mejs.ad-skip-info":["Skip in 1 second","Skip in %1 seconds"],"mejs.source-chooser":"Source Chooser","mejs.stop":"Stop","mejs.speed-rate":"Speed Rate","mejs.live-broadcast":"Live Broadcast","mejs.afrikaans":"Afrikaans","mejs.albanian":"Albanian","mejs.arabic":"Arabic","mejs.belarusian":"Belarusian","mejs.bulgarian":"Bulgarian","mejs.catalan":"Catalan","mejs.chinese":"Chinese","mejs.chinese-simplified":"Chinese (Simplified)","mejs.chinese-traditional":"Chinese (Traditional)","mejs.croatian":"Croatian","mejs.czech":"Czech","mejs.danish":"Danish","mejs.dutch":"Dutch","mejs.english":"English","mejs.estonian":"Estonian","mejs.filipino":"Filipino","mejs.finnish":"Finnish","mejs.french":"French","mejs.galician":"Galician","mejs.german":"German","mejs.greek":"Greek","mejs.haitian-creole":"Haitian Creole","mejs.hebrew":"Hebrew","mejs.hindi":"Hindi","mejs.hungarian":"Hungarian","mejs.icelandic":"Icelandic","mejs.indonesian":"Indonesian","mejs.irish":"Irish","mejs.italian":"Italian","mejs.japanese":"Japanese","mejs.korean":"Korean","mejs.latvian":"Latvian","mejs.lithuanian":"Lithuanian","mejs.macedonian":"Macedonian","mejs.malay":"Malay","mejs.maltese":"Maltese","mejs.norwegian":"Norwegian","mejs.persian":"Persian","mejs.polish":"Polish","mejs.portuguese":"Portuguese","mejs.romanian":"Romanian","mejs.russian":"Russian","mejs.serbian":"Serbian","mejs.slovak":"Slovak","mejs.slovenian":"Slovenian","mejs.spanish":"Spanish","mejs.swahili":"Swahili","mejs.swedish":"Swedish","mejs.tagalog":"Tagalog","mejs.thai":"Thai","mejs.turkish":"Turkish","mejs.ukrainian":"Ukrainian","mejs.vietnamese":"Vietnamese","mejs.welsh":"Welsh","mejs.yiddish":"Yiddish"}};
</script>
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<xxxx type=\'text/javascript\' src=\'https://www.markmallett.com/blog/wp-includes/js/mediaelement/mediaelement-migrate.min.js?ver=4.9.8\'></yyyy>
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/* <![CDATA[ */
var _wpmejsSettings = {"pluginPath":"\\/blog\\/wp-includes\\/js\\/mediaelement\\/","classPrefix":"mejs-","stretching":"responsive"};
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<link rel="alternate" type="text/xml+oembed" href="https://www.markmallett.com/blog/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fwww.markmallett.com%2Fblog%2F2018%2F01%2F02%2Fthe-relics-and-the-message%2F&format=xml" />';
my $regex = qr/<xxxx\b[^<]*(?:(?!<\/yyyy>)<[^<]*)*<\/yyyy>/mp;
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