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<?php

	if(isset($_POST['submit'])) {

		$username = $_POST['username'];
		$password = $_POST['password'];

		if(strlen($username) != 0 && strlen($password) != 0) {

			$userExists = false;

			$file = fopen('users.txt', 'r');

			if(filesize('users.txt') > 0) {
				$usersFile = fread($file, filesize('users.txt'));

				$users = explode('*', $usersFile);

				for($i = 0; $i < count($users); $i++) {
					if($i % 2 != 0) {
						if(in_array($username, $users)) {
							$userExists = true;
						}
					}
				}
			}

			if($userExists) {
				echo "momxmarebeli ukve arsebobos";
			} else {
				$writeStreamInUsers = fopen('users.txt', 'a');

				$userInformation = "${password}*${username}*";

				fwrite($writeStreamInUsers, $userInformation);

				echo "tqven daregistrirdit";
			}

		} else {
			echo "sheavset yvela veli";
		}
	}

?>

<!DOCTYPE html>
<html>
	<head>
		<title></title>
	</head>
	<body>
		<form method="POST">
			<input type="text" name="username" placeholder="username" /> <br /> <br />

			<input type="password" name="password" placeholder="password" /> <br /> <br />

			<input type="submit" name="submit" value="register" />
		</form>
	</body>
</html>