Regular expression are a great tool in the programming toolbox; and, they are amazing for string parsing. Because regular expressions are evaluated from left to right in a greedy fashion, we can have our regular expression pattern match parts of the domain moving from left to right; first, we'll match the protocol, then the domain name, then the rest of the string: Notice in this code that our regular expression matches the three crucial parts of the domain. And if I had to take a wild guess, Id bet that the code you put on your website is more than. Com ou sem DDI 55 (com ou sem + e/ou 00) Which means you likely compounded your other problems into this one. Or does everyone just use regular expressions or even worse simple string comparison? This post just saved me a few minutes years after the fact. Ha! Are you talking about getting it out of Anchor tags in a chunk of content? Not on the website. I then just created a webpage on my website.

xampp or on your website or both? The question is where to get the domainMatch function. In this tutorial we are going to cover more advance topics and compile search patters for emails, domain names, etc. The first task in our list would be to build a regex that would match a email address. Why dont second unit directors tend to become full-fledged directors? A common task is matching a domain name or a URL to see if it's associated with a specific domain name. www.example.com One, the External Links plugin, looks for tags for outbound links, and will add rel=nofollow or other attributes depending on the domain. For the record, I'm a fan of java.net.URL too! The advertisements are provided by Carbon, but implemented by regex101.No cookies will be used for tracking and no third party scripts will be loaded. If you really don't want to use a library, and insist on reinventing the wheel, then at least do something like the following: Essentially, you are delegating the extraction of the subdomain/domain part of the URL to the browser's URL parsing logic, which is MUCH better than anything you will ever write.

Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. The same RegExp as in anubhava's answer, only added support for protocol-relative URLs like //google.com: Here's a solution ignoring everything before ://. Understand Smart Contracts by Learning Solidity Basics, AI-100: Analyze solution requirements: Set 1 (2/2), Ten interesting features from various modern languages, Mettalex to Use DIA Oracles to Expand Markets Offering, Getting Started With PyvcloudA Python Library, Sorting Algorithms in PythonQuicksort worst-case, randomized version and three-way. Your regex expression works pretty well. Oh forget it.

(You must be signed in to vote). str_replace(array(https://, http://), , $url), PHP_URL_HOST); Do you have any better suggestion that will not go a miss on any form of url so the domain grabbing would be a 100% guarantee with your suggested code ?

*\.amazon\.com$/i might work, or it might not though an expression like that would work. prizes You then act on the domain name correctly for the domain name. Yes, because you are hard-coding a value into the variable $url. Well, if we use the Java class, java.net.URL, we can offload that heavy lifting. You have three sentences that want to be related to each other, but arent in a meaningful way. If you had read the manual over parse_url, you would have already known the extension doesnt matter, especially if you are asking for the PHP_URL_HOST specifically. Look this doesnt work: I get error: Laymen's description of "modals" to clients, in cricket, is it a no-ball if the batsman advances down the wicket and meets fulltoss ball above his waist. These are examples of why I'm insisting you must treat a domain name as a data structure, rather than as a simple string. It knows a set of Amazon domains, and uses the regular expression to match against the hostname portion of the URL. Couldnt experiment with the code any more due to short time. It's good to see Ben always giving multiple solution :) I didn't know about the JAVA method as well. You might think a regular expression is the way to go, but it has failings because while a URL looks like a text string it's actually a data structure. Another package popped up in a broader search: It's curious why domain-match is so thinly used, and why aren't there more packages of this sort? Nice. A domain name like I see SpaceShipTrooper LIKED your question. What version of PHP is your host utilizing? [ ]?\d[ ]?\d[ ]?\d[ ]?\d[ ]?\d[ ]?\d[ ]? In this case, the domain name is the second item matched and can be extracted from the matches using urlParts[ 2 ]. Connect and share knowledge within a single location that is structured and easy to search. Note, the page extensions I experimented with.

BigQuery Domain Function Case Sensitivity Discrepancy, Clean and extract Subdomains & Domains from URLs using Regex Notepad++, flutter compare check if two urls are similar, Extract HOST from URL containing braces or pipes using spark.sql parse_url(), Unable to scrape all the links from Google Search Page by Web Scraping. But I dont give much time to the manual because the complicated codes put me off from php. This is obviously assuming there is a "http://" at the front of the referer or URL but a simple check can be put in place to detect that and amend the output accordingly. Trending is based off of the highest score sort and falls back to it if no posts are trending. If that does not float your boat, then use a library like uri.js. after (?:www.) In other words, it is a constant sort of thingy . In doing so, it allows us to reference the captured domain in our replacement text. Thanks for the help by the way :), Regular Expression - Extract subdomain & domain, https://play.google.com/store/apps/details?id=com.skgames.trafficracer, http://tutorialzine.com/2013/07/quick-tip-parse-urls/. There is no one set place that I pull them from. Let me see how you guys would code it! The natural way to describe any subdomain of example.com is with the pattern match *.example.com, but where do we get a suitable matching algorithm? Great article by @BenNadel - Ask Ben: Getting The Domain Name From The Referer URL, Ben Nadel 2022. I missed the quotes on the first mention of google.com. Your only recourse is to process it with javascript on the response page you build. Imagine a site like youtube where people dont upload videos but audios (podcasts, etc.) And, when we run the above code, we get the following output: Works like a charm and we didn't have to get our hands dirty with any regular expressions. But if you need a clear example of the constant direction changing and/or the ambiguity of your postings, look no further than this: What am I supposed to take away from that? But, unfortunately I can't use it because of the reason stated earlier. I suppose we could also use ListToArray() and access it that way as well! You are missing quotes. By the way, what do you mean by "can't go on write javascript code"? Your regex doesn't seem correct. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I need to pass regular expression. In my actual webpage, ofcourse br tags would be added. If it isnt working on your website, you need to figure out how to get verbose error logging to work on your website so you can start to figure things out. Also see Parse URL with jquery/ javascript?, Parse URL with Javascript, How do I parse a URL into hostname and path in javascript?, or parse URL with JavaScript or jQuery. What do I mean that a domain name is a data structure? As such, we could grab the domain name by using a positive look behind on the protocol. At the top is .com, then example.com, then c.example.com, and so forth. Then, all we have to do is ask it of for the domain name (host) of the given URL. The easiest thing would probably be to extract all of the anchor tags, then from each of those, extract the HREF value. Thanks. US to Canada by car with an enhanced driver's license, no passport? But as I noted in the introduction, this doesn't match the domain name properly. portion from the subdomain+domain portion of an URL. It is working for me now too! Even more interesting is it matches not just the domain name but the other parts of the URL. What purpose are these openings on the roof? serve? Hence, I exit as quick as I entered the site. We can use wikipedia as an example as this is what I'm currently working on. This code isn't used on the browser side. Heres the updated code that is working . I did a few extra things to correct this issue. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You only need to remove the brackets. Hi Ben Nadel, I want to use regex code to extract only domain name for http referrers, can you please give me clue? Nope. Is moderated livestock grazing an effective countermeasure for desertification? Find centralized, trusted content and collaborate around the technologies you use most. See if cparadio.com or cpa-radio.com is available or not. Network, system and software engineer with true passion about technology. But, here is the issue: I just use the first element from the result array. The simplest way is to create an a element in memory, assign it an href, and then access its hostname and other properties. I don't need libraries. This regex is needed to accomodate the new varieties of accessible numbers. And, when we run this code, we get the following output: Part: http:// Part: www.shemuscle.com Part: /category/anonymous/. But thanks for helping me out I really appreciate it. I tried the following approx. I see a complete blank page. Tom, nice one! characters so I'm assuredly correctly matching the domain name. I see this result on xampp (Dont advise about the br tags. For example, in As you start accounting for more corner cases the regular expression starts to be more and more complex. Yes, but as with all of your topics you change directions every 5 minutes.

How did you miss those? I already glanced over this quickly about an hr ago: http://php.net/manual/en/function.parse-url.php. Could anyone please help me in this regard?

For a similar thing, I've gone down the following route: . Thanks! All content is the property of Ben Nadel. I see SpaceShipTrooper LIKING this post too.

Email addresses as probably.

Hence, you see a sudden shift in direction. The domain name a.b.c.example.com looks like a string, but is a nested data structure. Yeah, I totally forgot about using lists :). you are doing something wrong. Thanks for the suggestion, though. But, did I prevent it from matching a domain of iloveamazon.com? Your regex takes care of most of the URL types that we are going to encounter. Therefore, still on the hunt for the perfect regex. Of-course a check is required to make sure list has at-least 2 item. https://www.npmjs.com/package/domain-match. 465), Design patterns for asynchronous API communication. Can climbing up a tree prevent a creature from being targeted with Magic Missile? He is especially interested in clean energy technologies like solar power, wind power, and electric cars.

Great, good luck re-inventing the wheel and maintaining your broken regexps over the coming years. Actually, I was about to go out and found this link: https://stackoverflow.com/questions/3442333/php-regex-get-domain-from-url. Have to open a ticket with the webhost about this. rev2022.7.21.42639. Since reaching down into the Java layer is probably overkill for such a use case, I will instead explore two different methods to use the POSIX regex engine to get what we need. Yes, I've made sure to use the case-less modifier (i) and to escape the . In the previous examples, we had to do all of the heavy lifting ourselves in terms of figuring out how to parse the URL using regular expressions. Missed you old buddy! http://www.example.com Good.

And that could fail on some urls. what if I want only the domain name without the http(s) or www stuff? Mount 29'' wheels on Cube Reaction TM 2018. Versions: 7.3.5, 7.2.18, 7.2.4, 7.1.29, 7.1.0, 7.0.14, 7.0.5, 7.0.4, 7.0.3, 7.0.2, 7.0.1, 5.6.29, 5.6.20, 5.6.19, 5.6.18, 5.6.17, 5.6.2, 5.5.34, 5.5.33, 5.5.32, 5.5.31, 5.5.18, 5.5.5, Yeah. And, a GREAT shift! No, that is definitely not it Note: regex is faster than language built-in modules. We can use this function to match parts of the target URL and then pluck the domain name out of the returned matches.

Or consider that many sites, like google.com, have lots of subdomains, like drive.google.com or mail.google.com. While it might not seem intuitive to use a replace function to extract part of a string, if we replace the entire string with the substring that we are seeking, what do we end up with? Hence, I exit as quick as I entered the site. The final expression is: I know I am late to the party but I want to answer the question with some extra useful info. And, as you can see, we are replacing the entire URL with the value of the captured group - our domain. Check demo. But, all this is related to parse_url built-in function. I found this regex to grab domain name of urls: /^(?:http(?:s)?://)?(?:[^.]+.)?example.com$/. check below examples, regex comes out to be 15x faster than the built-in module. In this case changing prefix to prefix2 caused the URL comparison to not match. The information is fetched using a JSONP request, which contains the ad text and a link to the ad image. Off-topic: What is cpradio ? The Java URL takes care of the rest. I'm aware of the libraries available for parsing URL. Imagine a website where people listen to radio and the sound publishers earn money. Pattern to detect certain SQL queries in the PROCESSLIST results. I know how to get the actual anchor text but not the href value. One would possibly encode a more complete match in a more comprehensive regular expression e.g. As a final method, let's quickly explore the Java URL object. See http://tutorialzine.com/2013/07/quick-tip-parse-urls/. For use of code, http://www.shemuscle.com/category/anonymous/. It's really simple when you actually think about it. Best not to shift direction towards radio now. [-+ ]?[178]? Matches with Bangladeshi Mobile and Telephone Numbers, usato per fabbricatorino e sostituzione llaravel asset. Sounds cpa radio. I need a regular expression. Try this regex: You are about the one millionth person to try to parse URLs in JavaScript. But what happens if you only upload the above in a script to your website? Announcing the Stacks Editor Beta release! Not to mention parse_url doesnt pull out the extension, it pulls out the path, which would be the filename in your examples above. Yeah, I knew the extensions dont matter but I still wanted to experiment and see for myself. List usage is definitely an easy and straightforward way to go! Sure we can go with that summary, if not taking that literally to reflect as an actual constant variable that most languages support (dont confuse the two, even though they are similar). What drives the appeal and nostalgia of Margaret Thatcher within UK Conservative Party. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Look at my previous post. While I'm sure the predominant technique for matching domain names is regular expressions, they aren't a good mechanism for matching domain names. I'm pretty sure I could do some sort of array manipulation or something to get it. Now that you have hard-coded it, yes, quotes are absolutely necessary, no it doesnt matter if it is single or double quotes. Your code started with $url instead of a hard-coded value.

Fixed that and it is working. Can you see, the last few lines look like this: Can you spot what I am doing wrong here ? techsparx.com sure looks like a string, and we store it as a string in software. I wish I could do it client side that would save a lot of resources but at any rate I have figured it out. =regexreplace(B20;"ua(\/)";"ua\/ua\/"), Password, 8 chars, at least one special char, As more and more nigerians get new phone numbers daily, the main telcom companies in Nigerian increase the varieties of numbers to accomodate this greater demand.

What do you mean by hard coding ? David Herron is a writer and software engineer focusing on the wise use of technology. As such, we can either reach down into the Java layer and user the Java Pattern library; or, we can hack the POSIX engine to do what we need. thanks. doesn't work. Thanks a lot for that. It is only working on xampp. If you do not wish to put in the time to learn, there isnt much point in helping you. In previous part of these tutorial series I have made an introduction to regular expression and weve compiled some very basic search patterns to match numbers and names. @Ben I am not sure that ListToArray() will help here. /^amazon\.com$|. Provided $url was actually being set and sent to the function, quotes were not required, as it was a variable and would be interpretted as a string already. Yes, when my code doesnt work, I start experimenting. example.com. If we create an instance of the Java URL class and initialize it with our target URL, it will parse the URL internally and give use access to the URL components: Notice that all we have to do is create the URL instance and pass in our referer URL. I'm just trying to get a sense of what your use-case fully is. I am glad my old friend is back! It is hard to take your problems serious when there are responses like this. I hope this helps! I'm curious. The domain-match package is what came up first in my search on npmjs.com. I mean, I can't send the javascript code as argument. The anchor value is. Just mentioned it, incase anyone wants to develope the idea. URL ? How can I drop the voltage of a 5V DC power supply from 5.5V to 5.1V?

Is there any other way of extracting sub-domain & domain from any given URL using a regular expression? Yes, when my code doesnt work, I start experimenting. I think trying to go directly to the HREF value might be overly complicated. I'm trying to form a regular expression (javascript/node.js) which will extract the sub-domain & domain part from any given URL. For anyone trying to programmatically do stuff with the anchor on the response page besides the default behavior of the browser scrolling to the named anchor, the browser doesn't send it to the server so you won't get it in the cgi scope. He is getting active in my threads, again. Come-on, dont tell me you did not understand this: It means, the updated code is only working on xampp. And, when we run this code, we get the following output: If you are using ColdFusion 8, you can use the REMatch() function to gather all matches in a given string. The last thing you want to do is write yet another broken regexp, with all due respect to those that provided answers to your question. Is there a political faction in Russia publicly advocating for an immediate ceasefire? Sorry, I have to vote to close this as a duplicate. Its outputing everything on same line, add
tag for each echo. I just converted the whole page into arrays that are delimted by this, I then delimted that array by a " so I can call on each URL pretty easily. Our target substring. Because the REReplace() function allows use to capture groups in our regular expression and then use them within our "replacement text," we have the ability to replace our original string with just our target string: Notice that in the regular expression pattern, we are matching the entire URL, but we are only capturing the domain value. How would electric weapons used by mermaids function, if feasible? Instead, as we noted earlier, the natural way to describe a subdomain match is the pattern *.amazon.com. The scenario which I'm facing is, I can't go on write javascript code. Get the domain name from a link using regex. Run, execute and test PHP code from your browser. $('a').each(function(){alert($(this).attr('href'))}); Actually it does need to be done server side. This is what I ended up with: Right now, I'm just considering http, https for protocol & exclude "www." That looks like an intense UDF. Share cookie between subdomain and domain. Powered by Discourse, best viewed with JavaScript enabled. But I dont give much time to the manual because the complicated codes put me off from php. Can you spot what I am doing wrong here ? Remember, this is just rough experimenting). (You must be signed in to vote), 1 upvotes, 0 downvotes (100% like it) AkashaCMS has two plugins which must do this. Where are you getting these anchor tags? That means we must often write code checking if a URL is "within" domain A or domain B, and to act accordingly. It will grab domain name from the following type of urls: https://example.com You mean turning the value fixed, like a constant or string, by adding quotes ? In other words, you don't even have to parse the URL, the domainMatch function does it for you. And also turn on error reporting. A domain name comparison has to recognize that it's dealing with a data structure, and to compare correctly.

You're on a slippery slope into regular expression hell, and perhaps it's necessary to take a step back and consider the situation. Wouldn't a match expression like *.amazon.com make more sense? The JSON file and images are fetched from buysellads.com or buysellads.net. Another, Affiliate Links, looks to see if the outbound link matches a domain for which there is an affiliate relationship, it will add rel=nofollow, and additionally add the affiliate tag if it is missing.

For example, pages that have sample code on it would have href tags that are not true HREF tags. There are many well documented libraries and approaches to handling this. I am the co-founder and a principal engineer at InVision App, Inc the world's leading online whiteboard and productivity platform powering the future of work. But more importantly, it does domain name matching the way it's supposed to be done. https://example.com I know I am doing something wrong and so go easy on the crticisms! You are not going to go very far if you keep just copying and pasting random code you find on the internet into your project. Eg: And pasted this code, which I grabbed from that link: And, I saw a blank page. By convention the domain www.example.com is often equal to example.com. Have you checked their control panel for where their Access/Error logs may be stored?

DDD obrigatrio (com ou sem parnteses) Somente nmeros nacionais Does "/p" and "/t" have any meaning for the regular expression evaluator? In short, whenever I tested a snippet of code or my updated codes, I tested on both offline and online servers. If someone wants the code you can just email me. part. To expand on @Gandalfs question, what is the value of $url that you are passing into parse_url? Try: If you wish to know why, or how single or double quotes behave differently in PHP, I strongly recommend you borrow or buy a book and read it. Regular Expression for alphanumeric and underscores, Regular expression to match a line that doesn't contain a word. Can a timeseries with a clear trend be considered stationary? I always tend to shy away from reg ex's due to never quite "getting" them.

Hard coding (also hard-coding or hardcoding) is the software development practice of embedding data directly into the source code of a program or other executable object, as opposed to obtaining the data from external sources or generating it at run-time. Cpa income. Regex validao nmero celular e fixo Is there a regular expression to detect a valid regular expression? I'm a little bit surprised you didn't see any of the existing questions on SO dating back years. Hence, you see a sudden shift in direction. Some nice methods there Ben; I certainly didn't know about the JAVA method. How do you use a variable in a regular expression? What's desired is for the match to work like a domain name match should work. Ha! When you do that, you just have to be careful if the page has any instances of "href=" that are not part of actual HREF tags. For example you want to match amazon.com and www.amazon.com and any other subdomain of amazon.com. Normally, when we think about the domain name of a URL (which is what the CGI.http_referer value is), we think of the domain name as the part of the URL that comes after the protocol (http://, https://, ftp://, etc.). Google Sheets The first thing to notice is a domain name like ae-9.r24.snjsca04.us.bb.gin.ntt.net is deeply nested. But sometimes, we can offload the processing of strings to existing pieces of functionality like the Java URL class, and get what we need without any of the complexity associated with regular expressions. I generally just do: ListGetAt(referer,2,'/'). Story: man purchases plantation on planet, finds 'unstoppable' infestation, uses science, electrolyses water for oxygen, 1970s-1980s. David worked for nearly 30 years in Silicon Valley on software ranging from electronic mail systems, to video streaming, to the Java programming language, and has published several books on Node.js programming and electric vehicles. Check out the license. Please enable JavaScript to use this web application. Not bothered adding br tags because that was just a rough test. & "tplay." How can I validate an email address using a regular expression? Jody: Does it need to be done on the server side? (You must be signed in to vote), 2 upvotes, 0 downvotes (100% like it) The test of whether a domain name is a subdomain of another is not a simple case-less string comparison. Dont bother replying to this. The function takes regular expression, options and the value on which regex should be acted upon as arguments & returns the first match. This regular expression can be used to verify html (by removing the anchor before pair), as well as extract elements of html (specify elements before the pair). One method will use the REReplace() function and one method will use the REMatch() function (only available in ColdFusion 8 or later). I just put that in a php file, and it ran just fine. How can I do that? Can anyone Identify the make, model and year of this car? Love to read and spend time in nature. Anyway, I now tried these 2 codes which I made-up myself, figuring those is how they should have been: Again, blank page. Why did the gate before Minas Tirith break so very easily? Domain names are case insensitive, FWIW. You can now choose to sort by Trending, which boosts votes that have happened recently, helping to surface more up-to-date answers. Follow to join The Startups +8 million monthly readers & +756K followers. Parse error: syntax error, unexpected : in C:\xampp\htdocs\id\grab_domain.php on line 22, But for some reason, I still get blank page on my website. https://play.google.com/store/apps/details?id=com.skgames.trafficracer => play.google.com, https://mail.google.com/mail/u/0/#inbox => mail.google.com. Speaking of regex, links and all that is there any way possible to get the value of a href? Otherwise a URL with domain name "loveamazon.com" might match the regular expression /amazon.com$/i and do the wrong thing. That Dan Switzer is a really brilliant programmer. Or, imagine you opened a cpa ad publishing company that provides publishers with advertiser podcasts and you called your company cparadio. The anchor tags are pulled from everywhere. $url = "http://google.com"; I checked the expression & it almost works. Get smarter at building your thing. It would be really easy with jQuery on the client side. I'm not able to understand why "play." In other words, doesn't rewriting the above loop as so make more sense? How do you access the matched groups in a JavaScript regular expression? Dont worry, I know about single and double quotes. The Internet relies on domain names as a more user-friendly humane address mechanism than IP addresses. Im already swimming in too many ideas which I want to bring to life with php. But, I also need to ignore the "www." In AkashaCMS there was the following loop: The code as it stands "works" to a degree. If you have any questions or concerns, please feel free to send an email.

What is a non-capturing group in regular expressions? But again, incase you are wondering How APIs can take the pain out of legacy system headaches (Ep. What you are doing isnt experimenting, it is trying to learn through brute force, which is a horrible way to learn, but to each their own..



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