validate URL

[scvinodkumar]

Hi i have validate the URL in php. I am using the below regular expression to valdiate it...for some url its working but for few url its not working...could u plz help me

 

this is the code i am using currently

 

function isValidURL($url)
{            
    return preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $url);
}

 

For example, if enter the invalid url, still it accepting,

 

http://test

 

[.josh]

That's because you make the rest of the parts optional. 

 

(.[a-z0-9-]+)*

 

You require a single char and then one or more chars from the char class...but then group it (wrap it in parenthesis) and put a 0 or more quantifier on it, effectively making it optional.

 

(:[0-9]+)?

 

You require a : and then 1 or more numbers..but then group it and put a 0 or 1 quantifier on it, effectively making it optional.

 

(/.*)?

 

You require a / and then 0 or more of anything...but then group it and put a 0 or 1 quantifier on it, effectively making it optional.

 

Just google "url regex" or similar, you will see literally a ton of results for some good url validation regexes you can use...it's a very common topic.

[johnny86]

And there is a built in PHP function for that too:

filter_var($url, FILTER_VALIDATE_URL); // True if valid, else false