Validating site

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So far, we have a largely HTML page which defines the form; the only PHP so far is to specify the form’s action value.

Plus, learn how to email form data and save it in a My SQL database so that it's ready for other applications.At the start of the script, before any HTML, you can check whether the form has been submitted using attribute, and I’ve also marked whether or not the field is a required field for validation purposes.If the user does not comply with these rules, an error message will be displayed.FILTER_VALIDATE_URL is unreliable and it can't validate URLs based on IPv6 addresses.I stumbled on this whilst searching SO for any questions about PHP URL validation that don't use it, because I've found it to be pretty much useless.

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