Parse Error

I'm getting a parse error when i run the index.php


Parse error: parse error in C:\wamp\www\register_oop\database.php on line 17


heres my code line 17 is mysql_close($this->connection));



public function close_connection() {
if(isset($this->connection)) {
mysql_close($this->connection));
}
}

// Get rid of extra parenthesis
mysql_close($this->connection));

// Like this
mysql_close($this->connection);

Bingo, thanks