Mini Kabibi Habibi

<?php

declare(strict_types=1);

function is_input_empty(string $username, string $pwd, string $email) {
	if (empty($username) || empty($pwd) || empty($email)) {
		return true;
	}
	else {
		return false;
	}
}

function is_email_invalid(string $email) 
{
	if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
		return true;
	} else {
		return false;
	}
}

function is_username_taken(object $pdo, string $username) 
{
	if (get_username($pdo, $username)) {
		return true;
	} else {
		return false;
	}
}

function is_email_registered(object $pdo, string $email) 
{
	if (get_email($pdo, $email)) {
		return true;
	} else {
		return false;
	}
}