Form Validation with JS and PHP

[Cris987]

I read somewhere that it's a not faster to validate forms by with the client side (JS) and that PHP form validation should be used as backup. So I found some JS code to validate the form.

 

Now, how would I proceed to validate the form with PHP in the case that a user turns off JS?

 

Thanks.

[teng84]

valiadate it just how you validate your form using js

and it depends on how you want to validate input eg.. email, name , phone number etc...

[Cris987]

What I mean is... how can run my php code to validate my form ONLY when javascript has not been used ( in the case that a user has disabled JS) ?