$username= filter_input(INPUT_POST,"userName", FILTER_SANITIZE_STRING);
$email=filter_input(INPUT_POST,"userEmail", FILTER_VALIDATE_EMAIL);
$password = "";
$verifyPassword= "";
if(isset($_POST['userpassword'])){
    $password=$_POST['userpassword'];
}
if(isset($_POST['verifyPassword'])){
    $verifyPassword=$_POST['verifyPassword'];
}
//$verifyPassword=filter_input(INPUT_POST,"verifyPassword",FILTER_SANATIZE_STRING);

        //pattern against which to check email validity
        $good_email = "[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+.[A-Za-z]{2,4}";
        $goodPassword = "/^(?=.*d)(?=.*[A-Za-z])[0-9A-Za-z!@#$%]{8,255}$/";

        //if provided data is valid (email especially) and no form field has been left empty display "everything is okay"
        if(strlen($username) > 0 && strlen($email) > 0 && preg_match("/$good_email/", $email) && strlen($password) > 0  && preg_match("/$goodPassword/",$password) && strlen($verifyPassword) > 0 && $password == $verifyPassword)
        {
            $stmt1 = $dbh->prepare("SELECT userEmail FROM regularUser WHERE userEmail = :email");
            $stmt1->bindParam("email", $email) ;
            $stmt1->execute();
            $result1 = $stmt1->fetchAll(PDO::FETCH_ASSOC);
            $count = $result1->rowCount();
                    if($count > 1)
                    {
                            echo "Email already exist";
                    }
                    else
                    {
                        $stmt = $dbh->prepare("INSERT INTO regularUser(userEmail,userName,userPassword) VALUES (:email,:name,:password)");
                        $stmt->bindParam("email", $email) ;
                        $stmt->bindParam("name", $username) ;
                        $hash = password_hash($password, PASSWORD_BCRYPT);
                        $stmt->bindParam("hash_password", $hash) ;
                        $stmt->execute();
                        var_dump($stmt);
                        echo "success";
                    }
        }
        else{

            //if message has been left empty let the user know that the name is required
            if(strlen($username) == 0){
                echo  "<br/>Name is required";
            }
            //if the email is left empty let the user know that an email is required
            else if(strlen($email) == 0){
                echo  "<br/>Email is required";
            }
            //if the email does not match the pattern ($good_email) let the user know that the email they have supplied is invalid
            else if(!(preg_match("/$good_email/", $email))){
                echo   "<br/>Email is not valid";
            }
            else if(!(preg_match("/$goodPassword/", $password))){
                echo   "<br/>Password is not valid";
            }
            else if(strlen($password) == 0){
                echo   "<br/>Length of the password is not right";
            }
            else if(strlen($verifyPassword) == 0){
                echo  "<br/>Password not matched";
            }
        }