Question

I have a very simple text input (below) that asks for the users email. I would like to run a PHP check to make sure this really is an email in the format [e-mail]. Would this involve the filter validate email function? Also, can I perform this same check in jQuery?

HTML:

<input type='text' id='email' name='email' />

Answer 1

PHP Validation:

<?php
$email = $_GET['email'];
if (!filter_var($email, FILTER_VALIDATE_EMAIL))
{
    echo "The email is not valid.";
    exit;
}   
?>

For jquery validation you can use this plugin http://bassistance.de/jquery-plugins/jquery-plugin-validation/ or you can use javascript function like this.

function validateEmail(email){
   var filter = /^[a-zA-Z0-9]+[a-zA-Z0-9_.-]+[a-zA-Z0-9_-]+@[a-zA-Z0-9]+[a-zA-Z0-9.-]+[a-zA-Z0-9]+.[a-z]{2,4}$/;
    if(filter.test(email)){
        return true;
    }
    else{
        return false;
    }
}