- filter_var: documentation ( source)
<?php
$sqli = mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME) or die("Error: ".mysqli_error($sqli));
$email = mysqli_real_escape_string($sqli, $_POST['email']);
if (!filter_var($email, FILTER_VALIDATE_EMAIL))
{
$errorValidateEmail = TRUE;
$saveRegister = FALSE;
}
?>