Top "Validation" questions

Validation is used to check data to make sure it fits whatever required specifications are set for it.

What is the best Java email address validation method?

What are the good email address validation libraries for Java? Are there any alternatives to commons validator?

validation email apache-commons java
jQuery add required to input fields

I have been searching ways to have jQuery automatically write required using html5 validation to my all of my input …

javascript jquery validation
Validating email addresses using jQuery and regex

I'm not too sure how to do this. I need to validate email addresses using regex with something like this: […

regex validation email email-validation
Why a function checking if a string is empty always returns true?

I have a function isNotEmpty which returns true if the string is not empty and false if the string is …

php string validation
How to Call a JS function using OnClick event

I am trying to call my JS function that I added in the header. Please find below code that shows …

javascript html forms validation html-validation
Validation of file extension before uploading file

I am uploading images to a servlet. The validation whether the uploaded file is an image is done in server …

javascript jquery validation file-upload
How to validate date with format "mm/dd/yyyy" in JavaScript?

I want to validate the date format on an input using the format mm/dd/yyyy. I found below codes …

javascript validation date
A non well formed numeric value encountered

I have a form that passes two dates (start and finish) to a PHP script that will add those to …

php validation date time
What is the maximum length of a valid email address?

What is the maximum length of a valid email address? Is it defined by any standard?

validation email max email-address
Check if a number has a decimal place/is a whole number

I am looking for an easy way in JavaScript to check if a number has a decimal place in it (…

javascript validation numbers integer