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Although this seems like a trivial question, I am quite sure it is not :) I need to validate names and surnames of people from all over the world. If it were only English ones I think that this would cut it: I doubt that this is feasible - there are just to much Unicode symbols to exclude all unwanted symbols (and how will tell you what Chinese symbols to exclude?
I think that the assumption that every website must accommodate every possible name is fallacious.
However, You should always customize the validation error messages.
If you imagine form as a dialog between your website and your user, the messages play an important role.
Validating data in Microsoft Access allows you to check data whilst it is being entered by the database user and will enable you to not save the data if it breaks any validation rules or routines.
It is easy for an end user to make a mistake when they are entering data or even to leave out important details that must be entered, so we need to check this data when it is being entered into the database.
If all you're doing is reading and writing to the db, then properly parameterizing queries should take care of the problem.
However, if you're ever going to dynamically execute code from the db, then you have to be careful (such as using the exec() statement.
Adding HTML5 validation to the checkbox is actually very simple.
All you need to do is include a This tells the browser that the form should not be allowed to submit without the checkbox checked.
Verimail keeps validating on keyup, which means, as soon as you start typing, you get an error message.
Generally great plugin, but this one is a deal breaker - I would prefer to validate only when triggered manually, i.e.
Allowing invalid data to be entered into the database ensures that the database and the data available will become less valuable and harder for the user to use.