This function is the typo of "is_writable" !! Not an alias !! xD
(PHP 4, PHP 5)
is_writeable — Sinônimo de is_writable()
Esta função é um apelido para: is_writable().
writeable is actually an acceptable way of spelling it (http://www.thefreedictionary.com/writeable) and as such makes is_writeable an alias. It would be an alias anyways.
Yes, the english language is stupid, I know. Why pterodactyl has a p at the beginning, the world may never know.