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url validation\


jimfog
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I have come across in the web with various code examples regarding url validation.

 

Nonetheless I want to hear from you also what code might work here-based on your experience.

 

Obviously we are talking here about a Regular Expression.

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I haven't encountered a situation where a URL has to be verified. You just need to make sure they aren't allowed to start the URL with "javascript:" so the user can't mess up your site.

 

You probably only need to check that the URL starts with http: // or https: // but you could use an expression that generalizes for any protocol (excluding "javascript:")

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I'm not sure I would validate a URL in Javascript. In PHP I would use filter_var with the URL filter, and parse_url. I would use parse_url to break it up and then rebuild it myself so that it only contains the parts I want, if I don't want everything.

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