Regular expression for validating url in php

18 Feb

The second validation block also takes care of excluding IP address terminating with 0 or 255 (non usable network and broadcast addresses of each class C network).

He also sliced up the Unicode ranges :=), that's the reason his one is so long :) = 224.0.0.0/8 are excluded by the second validation block.

trait which provides a convenient method to validate incoming HTTP request with a variety of powerful validation rules.

To learn about Laravel's powerful validation features, let's look at a complete example of validating a form and displaying the error messages back to the user.

If someone is entering information into your form, you need to validate it! Well, whenever dealing with large amounts of text patterns that need to be followed, I always turn to Regular Expressions.

Regular Expressions are a way of following a pattern you define.

Then, there is the "m" modifier which will treat a multiple line subject as actually multiple lined.In the case of a traditional HTTP request, a redirect response will be generated, while a JSON response will be sent for AJAX requests. Again, if the validation fails, the proper response will automatically be generated.If the validation passes, our controller will continue executing normally. Negative lookahead is used instead NOTE, that package does fuzzy search, not strict validation. If they copy it out and back into a browser so they may not know what's wrong with it upon visual inspection. Validation is a common concern for webmasters everywhere. If you want to add more URLs to test, you can simply add them to the The output will then be provided to the web browser as either a valid or an invalid URL.While I won't teach you Regex, I will tell you about Regex in PHP.PHP predominantly uses the flavor of Regex that Perl does. This a very minimal list of tests to add to your testings: PASS " " " FAIL " " " " " Need testing :) Need to mention I took the idea of validating the possible IP address ranges in the URL while looking at other developers regular expressions I have seen in your tests, especially the one from @scottgonzales. $_iu S I have added simple network ranges validation, the rules I used are: - valid range 1.0.0.0 - 223.255.255.255, network adresses above and including 224.0.0.0 are reserved addresses - first and last IP address of each class is excluded since they are used as network broadcast addresses since I don't think this is worth implementing completely in a regular expression, a following pass should exclude the Intranet address space: 10.0.0.0 - 10.255.255.255 172.16.0.0 - 1.255 192.168.0.0 - 192.168.255.255 the loopback and the automatic configuration address space: 127.0.0.0 - 127.255.255.255 169.254.0.0 - 169.254.255.255 while the local, multicast and and the reserved address spaces: 0.0.0.0 - 0.255.255.255 (SPECIAL-IPV4-LOCAL-ID-IANA-RESERVED) 224.0.0.0 - 239.255.255 (MCAST-NET) 240.0.0.0 - 255.255.255.255 (SPECIAL-IPV4-FUTURE-USE-IANA-RESERVED) should already be excluded by the above regular expression.