filter_var in php 5.3.8

Question

I am developing a user registration form and want to validate a user\'s email address. However,all the php docs I have read suggest the use of filter_var. My script validate

Answer 1

In your case you shouldn't use filter_var, but filter_input. This is all the code you would need:

if ($email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL)) {
    // email was submitted and is a valid email
}

This bug might be related to your problem though.

Answer 2

  if(isset($_POST['email'])== true && empty($_POST['email'])false)
                           ^^^^^^^--redundant               ^^^^^---typo?

Answer 3

$email = isset($_POST['email']) ? $_POST['email'] : "";
echo(filter_var($email,FILTER_VALIDATE_EMAIL) ? "valid email" : "invalid email");

Answer 4

if(isset($_POST['email'])== true && empty($_POST['email'])false)

this should be

if(isset($_POST['email']) && !empty($_POST['email']) )

or as @jack you can use just

if (!empty($_POST['email']))

the empty() does implicit isset()