note 94618 added to language.variables.scope

A few people have stated already that global doesn't work in a nested function to access variables of the outer function. However, nobody seems to know why, or even whether there's a way to do it. After experimenting, I've discovered that it can't be done for this reason: nested functions in PHP aren't really nested functions at all. Rather, all functions are in global scope. A function defined within a function is really just a statement that, on execution, adds the function to the global scope. To see what I mean, try this at home: <?php function qwert() { yuiop(); function yuiop() { echo 'yuiop'; } yuiop(); } yuiop(); qwert(); yuiop(); ?> Now delete the one call to yuiop that triggers an error and try again. Repeat until it runs without error. ---- Server IP: 92.48.74.199 Probable Submitter: 87.194.178.55 ---- Manual Page -- http://www.php.net/manual/en/language.variables.scope.php Edit -- https://master.php.net/note/edit/94618 Del: integrated -- https://master.php.net/note/delete/94618/integrated Del: useless -- https://master.php.net/note/delete/94618/useless Del: bad code -- https://master.php.net/note/delete/94618/bad+code Del: spam -- https://master.php.net/note/delete/94618/spam Del: non-english -- https://master.php.net/note/delete/94618/non-english Del: in docs -- https://master.php.net/note/delete/94618/in+docs Del: other reasons-- https://master.php.net/note/delete/94618 Reject -- https://master.php.net/note/reject/94618 Search -- https://master.php.net/manage/user-notes.php