Question

As of now I am validating my inputs using this type of approach

<form method="post">
<label>Email</label>
<input type="email" name="user_email">
<input type="submit" name="reg">
</form>
if(isset($_POST['reg']){
$result = checkEmail($_POST['email']);
//checkEmail() is my function to check email, if it returns true it has duplicate
if($result){
echo '<p>E-mail already exist!</p>'
else{
//something to do in this..
}

I have seen some website after I type the email it automatically updates and i want to learn how to that without using any frameworks since I am just a starter, i just want a simple code. Any suggestions or advice on how to do it? Thank you 🙂

Answer 1

You’d have to use Ajax for that. To use Ajax natively is a lot of work though, you’d have to care for different browsers and a lot of ground work which can be taken care of by using a lightweight javascript libraries like jQuery. Using jquery together with an excellent plugin like Validate you can achieve what you’re looking for. They have a working example of what you’re trying to do at this demo page