Re: [PHP or maybe JavaScript or CSS] protecting my PHP from bad input

Thanks Eugen, I'm familiar with the concepts, but I've seen sites with textboxes that would not show any letter typed - only numbers are displayed in the textbox. This is what I like but don't know how to achieve. :-) > : #The problem: > : This is about protecting my PHP from bad input (e.g.: letters instead > : of numbers). > > Good idea. You need to make sure user-inputted data is valid. > > : ## > : Is there a way to prevent user from even inputting a letter in a text > : box? > > There's two general ways to do data validation: client-side and > server-side. PHP is server-side. JavaScript is client-side. . . .