View Full Version : URL Validation

06-08-2007, 03:31 PM
I have some javascript code for a URL validation but it doesnt seem to want to work with the following url... (i think its the " ~ " which is causeing the problem)

var w = new RegExp();

example url

Also, can anyone recode this so that the following url would also work..

example url

Can anyone help?


06-08-2007, 03:40 PM
add the ~ to the regualr expression than


06-08-2007, 03:55 PM
Thanks. I tried that but it didnt seem to work. What about the other url using a sub domain rather than www ?

06-08-2007, 04:11 PM
change [www]+ to (www)?


Philip M
06-08-2007, 04:36 PM
I am not sure how you have derived your regex but it is completely wrong.

e.g. [www] means match w or w or w, not www.

The “safe” characters in a URL are alphanumerics (A to Z, a to z and 0 to 9) and the following special characters: the dollar sign (“$”), hyphen (“-”), underscore (“_”), period (“.”), plus sign (“+”), exclamation point (“!”), asterisk (“*”), apostrophe (“'”), left parenthesis (“(”), and right parenthesis (“)”).

The regex you desire (i.e. validate a URL) is:-


& and ? cannot normally appear as part of a URL except in query string.

A tilde ~ is not "safe" character but I have included it. A space should be encoded as %20

What is w.compile supposed to do?

In fact it may be simpler and just as effective to just check the starting characters in the URL up to www.


You can test your regular expressions at: http://www.ogauge.co.uk/regextester.html