Validate_fields Class

I created this class to get an easy to use form field validation script. Use this class to validate your database inputs or mail forms. Of course there is much more to validate: postcodes, special strings, credit card number etc. In this version is it possible to validate simple text, numbers (with decimals, too), dates, URL's, e-mail addresses and for HTML-tags. Invalid form fields will be reported inside a detailed error message. If all form fields are valid you can use the boolean to submit your form.