New posts in validation

HTML5 form required attribute. Set custom validation message?

JavaScript: client-side vs. server-side validation

An invalid form control with name='' is not focusable

Reference - Password Validation

Interactively validating Entry widget content in tkinter

How to allow only numeric (0-9) in HTML inputbox using jQuery?

Which characters make a URL invalid?

Validating input using java.util.Scanner [duplicate]

What is the maximum length of a valid email address?

Is there any difference between 'valid xml' and 'well formed xml'?

Validation Error: Value is not valid

A potentially dangerous Request.Form value was detected from the client

How can I check if a string is a valid number?

Validate decimal numbers in JavaScript - IsNumeric()

How to validate phone numbers using regex

What's the best way to validate an email address in JavaScript?

How does the SQL injection from the "Bobby Tables" XKCD comic work?

How can I validate an email address using a regular expression?