note 106691 added to reserved.variables.globals

@Anonymous For one thing you can't use the 'global' keyword to define/manipulate what you wish to include inside the function. You would at most do; global $foo; Doing anything other you'll probably get an 'unexpected =' error. The main difference between $GLOBALS superglobal variable and the global keyword is that, while you can modify an external variable by doing say; <?php $foo = 'arr'; echo $foo . "\n"; function moo() { $GLOBALS['foo'] = 'bar'; } moo(); echo $foo . "\n"; ?> But not if you would do something such as; <?php $foo = 'arr'; echo $foo . "\n"; function moo() { $foo = $GLOBALS['foo']; $foo = 'bar'; echo $foo . "\n"; } moo(); echo $foo . "\n"; ?> In this aspect, you would be creating $foo within the class, as a copy of the external $foo variable, and modifying it only within the class. However using the global keyword as such; <?php $foo = 'arr'; echo $foo . "\n"; function moo() { global $foo; $foo = 'bar'; } moo(); echo $foo . "\n"; ?> You'll see that changes to $foo inside the function, will pass to the variable entirely. The main difference is, the one in some opinions might be cleaner looking, as well as makes it easier to modify variables in the global scope if you want to. ---- Server IP: 192.41.42.26 Probable Submitter: 96.247.146.250 ---- Manual Page -- http://www.php.net/manual/en/reserved.variables.globals.php Edit -- https://master.php.net/note/edit/106691 Del: integrated -- https://master.php.net/note/delete/106691/integrated Del: useless -- https://master.php.net/note/delete/106691/useless Del: bad code -- https://master.php.net/note/delete/106691/bad+code Del: spam -- https://master.php.net/note/delete/106691/spam Del: non-english -- https://master.php.net/note/delete/106691/non-english Del: in docs -- https://master.php.net/note/delete/106691/in+docs Del: other reasons-- https://master.php.net/note/delete/106691 Reject -- https://master.php.net/note/reject/106691 Search -- https://master.php.net/manage/user-notes.php