Re: PEAR_Callback proposal

Hi, Lukas Feiler wrote:

A couple of days ago I proposed the package PEAR_Callback; see http://pear.php.net/pepr/pepr-proposal-show.php?id=468 It addresses three major limitations of the callback pseudo-type: - By looking at a callback pseudo-type variable you cannot tell if it really is a callback. - The callback pseudo-type does not allow you to specify arguments at the time you create the callback. - There is no way to force a user to pass only callback functions to your API, that meet certain requirements (i.e. accept certain arguments and have a certain return type)

All of these major limitations can be overcome by using the Command design pattern: http://en.wikipedia.org/wiki/Command_pattern I don't honestly see the benefit for PEAR in adding a wrapper around functions when all these checks are already available for classes / objects in PHP5.