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How to validate a url

Posted on 2011-09-21
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Last Modified: 2012-05-12
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Question by:dvcphp
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Expert Comment

by:Zvonko
ID: 36577143
This one:
/^(https?:\/\/)?(\w[\w\-\.]*)+(\/(\w[\w\-\.]*)+)+(\?[\w\=\%\&]*)?(\#[\w]*)?/

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will not allow the // after .com as in yout third line example.
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Expert Comment

by:Zvonko
ID: 36577201
Sorry, ignore the upper.

Check please this:
/^(https?:\/\/)?(\w[\w\-\.]*){3,}(\.(\w[\w\-\.]*){2,}){2,}(\/(\w[\w\-\.]*)+)?(\?[\w\=\%\&]*)?(\#[\w]*)?/

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Expert Comment

by:Zvonko
ID: 36577211
Sorry I missed the $ at the end.
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LVL 63

Expert Comment

by:Zvonko
ID: 36577220
If you are extracting URLs the use \b patter instead of string begin and end characters ^and $
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Author Comment

by:dvcphp
ID: 36577249
Hi Zvonko,
I tried the code.It seems to work only with the third condition.I am sorry I mistyped 2 // .It should be one /
Is it possible to have all the 3 conditions working.

Also I need to check the same expression with something below

www.something.org/body.sgs?id=3435123

www.something.org/#!comm.home    and

www.something.org/About+Us/Co+Integrity/Comm+Needs+help
Thanks,
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Expert Comment

by:Zvonko
ID: 36577443
Check this please:
/^(https?:\/\/)?(\w[\w\-\.]*){3,}(\.(\w[\w\-\.]*){2,}){2,}(\/(\w+([\w\-\.\+]+\/?)*)*)*(\?[\w\=\%\&\+\.]*)?(\#[\w\!\.\+]*)?$/

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Author Comment

by:dvcphp
ID: 36577473
Thank you so much.That worked like a charm.

Thank you again.You are truely a Genius.
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Expert Comment

by:Zvonko
ID: 36577488
<|:-)
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Accepted Solution

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Zvonko earned 500 total points
ID: 36577518
One additional note: the last expression allows this:
www.something.org#!comm.home 

I wanted to avoid that but my IE8 browser slowed down and after several loops crashed.

This is the expression to force a slash before query or hash url parameters:

/^(https?:\/\/)?(\w[\w\-\.]*){3,}(\.(\w[\w\-\.]*){2,}){2,}(\/(\w+([\w\-\.\+]+\/?)*)*(\?[\w\=\%\&\+\.]*)?(\#[\w\!\.\+]*)?)?$/

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Author Comment

by:dvcphp
ID: 36577543
Thanks for letting me know.
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