PHP Regex
- May 17, 2008
Validate URL Using PHP Regex
There are times you may want a URL validation function that accepts (I think) most known types of URL’s. Useful for validating a homepage link, or submission of links from the public.
It allows for port, path and query string validations, the parameter $url string contains the user input URL and the function returns the boolean of true or false.
<?php
/**
* Validate URL
* Allows for port, path and query string validations
* @param string $url string containing url user input
* @return boolean Returns TRUE/FALSE
*/
function validateURL($url)
{
$pattern = '/^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/';
return preg_match($pattern, $url);
}
$result = validateURL('http://www.google.com');
print $result;
?>
Hope this helps!
12 Responses to “Validate URL Using PHP Regex”
thanks for this simple yet handy script!
By m0dk1d on Jun 5, 2008
It doesn’t work for me in PHP 5.2.5
Warning: preg_match() [function.preg-match]: Unknown modifier ‘[’ in C:\xampp\htdocs\test.php on line 18
By Ben Wallis on Jun 6, 2008
Hi, Ben
I have rewritten the code and tested it, now when you run the code above, you should get either ‘1′ or ‘0′ as results stands for ‘true’ or ‘false’.
Thanks for pointing it out. Do let me know if there is anymore problem. :)
By admin on Jun 6, 2008
http://www-google-com
http://www_google_com
This regex fails in so many ways
By Not very useful on Jun 11, 2008
Hi, thanks for point out the problems. It’s fixed now.
By admin on Jun 14, 2008
This code does not work. It’s outdated now
By desbest on Jun 23, 2008
Your code can tell whether something is in a url format such as it beginning with http:// or http://www. but it does not say whether a url actually exists.
i tried your code with a domain that does not exist and it said “1″ that the url was valid
By desbest on Jun 23, 2008
After 10 minutes searching for a better url validator than this one, I couldn’t find one. I’ve added you to delicious.
Even the check if a url exist snippets dont work and require curl.
By desbest on Jun 23, 2008
hi, desbest, mine script is a simple checker that may still need perfection. if there’s anything you can contribute to perfect it, i would appreciate it, i would try to perfect it if i got more time. maybe for now you can take a look at the following link which might be the thing you are looking for:
http://www.bootstrike.com/PHPAJAXDomainCheck/#bulkdomain
By admin on Jun 23, 2008
Not working… :(
It allows garbage urls…
By Marian Bucur on Aug 5, 2008
Best Site good looking freexnxx >:-]]
By Hawyqpyc on Sep 21, 2008
Thanks funny site
By Wawlaywa on Sep 27, 2008