Quickly add + to positive strings [PHP]

[CaroasCeshy]

Hay all, is there a PHP function which adds "+" to positive strings?i.e\[code\]function(4) // returns +4function(1.0) // returns +1.0function(-1) // returns -1function(0) // returns +0\[/code\]ThanksEDIT: wants to take and return strings.