{"id":28285,"date":"2022-12-29T22:54:49","date_gmt":"2022-12-29T17:24:49","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-regex-to-extract-only-domain-from-sub-domains-duplicate\/"},"modified":"2022-12-29T22:54:49","modified_gmt":"2022-12-29T17:24:49","slug":"solved-regex-to-extract-only-domain-from-sub-domains-duplicate","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-regex-to-extract-only-domain-from-sub-domains-duplicate\/","title":{"rendered":"[Solved] Regex to extract only domain from sub-domains [duplicate]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-31312801\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"31312801\" data-parentid=\"31311768\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Just to iterate on Jens&#8217; comment, we have to guess: What is your expected output when additional information appears, e.g. <code>http:\/\/therealzenstar.blogspot.fr\/somedata.html<\/code>. Is it still <code>blogspot.fr<\/code>? Are such examples needed to be adresed?<\/p>\n<p>You said you want to replace &#8220;everything else&#8221; with <code>\"\"<\/code>. <code>Replace()<\/code> will replace everything that is matched with what you want. So, to replace it with <code>\"\"<\/code>, you&#8217;d need to match everything that you <strong>do not want<\/strong>.It&#8217;s possible, however, it&#8217;s much easier to capture what you DO want and replace all the match with $1.<\/p>\n<p>Assuming you always want only the <code>domain.xx<\/code>, even if more information appears. Something like this will work: <code>^(?:https?:\\\/\\\/)?[^\\\/\\s]*\\.([^.\\s\\\/]*\\.[^.\\s\\\/]*)(?:$|\\\/.*)<\/code>, as seen: <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/regex101.com\/r\/hN8iQ7\/1\">https:\/\/regex101.com\/r\/hN8iQ7\/1<\/a><\/p>\n<p>A problem arises if your domains also include those with multiple extensions. I.e. <code>domain.co.uk<\/code>. You&#8217;d need to adress them specifically (naming them), as it is very hard to generalize a way to distinguish these items.<\/p>\n<p><code>^(?:https?:\\\/\\\/)?[^\\\/\\s]*?\\.([^.\\s\\\/]*\\.(?:co\\.uk|[^.\\s\\\/]*))(?:$|\\\/.*)<\/code> &#8211; with <code>.co.uk<\/code> option added. <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/regex101.com\/r\/hN8iQ7\/2\">https:\/\/regex101.com\/r\/hN8iQ7\/2<\/a> .<\/p>\n<p><code>yourregex.Replace(yourstring, \"$1\")<\/code> may do what you need.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Regex to extract only domain from sub-domains [duplicate] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Just to iterate on Jens&#8217; comment, we have to guess: What is your expected output when additional information appears, e.g. http:\/\/therealzenstar.blogspot.fr\/somedata.html. Is it still blogspot.fr? Are such examples needed to be adresed? You said you want to replace &#8220;everything else&#8221; with &#8220;&#8221;. Replace() will replace everything that is matched with what you want. So, &#8230; <a title=\"[Solved] Regex to extract only domain from sub-domains [duplicate]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-regex-to-extract-only-domain-from-sub-domains-duplicate\/\" aria-label=\"More on [Solved] Regex to extract only domain from sub-domains [duplicate]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[352,324,347],"class_list":["post-28285","post","type-post","status-publish","format-standard","hentry","category-solved","tag-net","tag-c","tag-regex"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Regex to extract only domain from sub-domains [duplicate] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-regex-to-extract-only-domain-from-sub-domains-duplicate\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Regex to extract only domain from sub-domains [duplicate] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Just to iterate on Jens&#8217; comment, we have to guess: What is your expected output when additional information appears, e.g. http:\/\/therealzenstar.blogspot.fr\/somedata.html. Is it still blogspot.fr? Are such examples needed to be adresed? You said you want to replace &#8220;everything else&#8221; with &quot;&quot;. Replace() will replace everything that is matched with what you want. So, ... 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