Databases
StackOverflow2013
Postsdbo
POImproving regex pattern to also validate ipv6 / punycode / foreign domain names
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POImproving regex pattern to also validate ipv6 / punycode / foreign domain names
    primarykey
    data
    text
    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/206059/php-validation-regex-for-url">PHP validation/regex for URL</a><br> <a href="https://stackoverflow.com/questions/3026957/how-to-validate-a-domain-name-using-regex-php">How to validate a domain name using Regex &amp; Php?</a> </p> </blockquote> <p>I currently use this regex pattern to validate domain names before they are added to my database:</p> <pre><code>$pattern = '/^https?:\/\/([a-zA-Z0-9_\-]+:[^\s@:]+@)?((([a-zA-Z][a-zA-Z0-9\-]+\.)+[a-zA-Z\-]+)|((2(5[0-5]|[0-4][0-9])|[01][0-9]{2}|[0-9]{1,2})\.(2(5[0-5]|[0-4][0-9])|[01][0-9]{2}|[0-9]{1,2})\.(2(5[0-5]|[0-4][0-9])|[01][0-9]{2}|[0-9]{1,2})\.(2(5[0-5]|[0-4][0-9])|[01][0-9]{2}|[0-9]{1,2})))(:[0-9]{1,5})?(\/[!~*\'\(\)a-zA-Z0-9;\/\\\?:\@&amp;=\+\$,%#\._-]*)*$/'; </code></pre> <p>This pattern allows sub domains, ipv4 strings etc. Since this is for a directory, it does not allow strings that are normally valid, such as <code>http://localhost</code> but anyways, what I need to add would be support for ipv6 IP strings and also international domain names like for example müller.com</p> <p>I currently use:</p> <pre><code>$url = "http://müller.com/" if(preg_match($pattern,$url)) { echo "valid"; } else { echo "invalid"; } </code></pre> <p>and it validates pretty much everything I want it to validate, except ipv6 addresses and foreign characters.</p> <p>I wonder if anyone would be able to come up with the two additions, as it would really make my day. Be aware that I am extremely new to PHP, so please do not throw things at me. Instead, it would be much more useful if you could show me a working example and explain what you have added.</p> <p>Maybe it's required to convert foreign stuff into a valid punycode URL before checking it and then to allow punycode instead. I am open for suggestions.</p> <p>Thank you so much - Your help is greatly appreciated</p> <p>Edit: I doubt this question is a duplicate, as I am not looking for a similar solution, plus the referred existing ones do not work out. FILTER_VALIDATE_URL does not work as it will allow strings that I do not want to allow and other solutions also make my regex pattern useless. </p> <p>What I am looking for is what I have, but additionally supporting ipv6 IP strings and punycode names / international names.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCommunity
    1. USMarcus Weller
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTDuplicate
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. CO[`FILTER_VALIDATE_URL`](http://www.php.net/manual/en/filter.filters.validate.php) for [`filter_var()`](http://php.net/manual/en/function.filter-var.php) is what you are looking for, I think.
      singulars
      1. POImproving regex pattern to also validate ipv6 / punycode / foreign domain names
      1. USDaveRandom
    2. COI found a very HUGE regex for IPv6 addresses [here](http://forums.intermapper.com/viewtopic.php?t=452). That seems to be an all-cases regex. You can easily find weaker versions of that around Internet if you think you don't need to verify addresses so deeply. Anyway you need to grab one of those regex and put it in your current regex this way: `...{2}|[0-9]{1,2}))|<HERE>)(:[0-9]{1,5})?...`
      singulars
      1. POImproving regex pattern to also validate ipv6 / punycode / foreign domain names
      1. USCarlos
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload