note 129208 added to language.variables.scope

Note that the global keyword inside a function does (at least) 2 different things: 1) As stated in the manual, it allows the function to use *the global version* of the variable: "...all references to either variable will refer to *the global version*." [emphasis mine] 2) As not stated in the manual, if the variable does not already exist in the global scope, it is created in the global scope. For example, in the code below, the variable $A is available in the global scope (after functionA is called), even though it was never declared in the global scope: <?php echo "<p>This is A before functionA is called: {$A}.</p>"; functionA(); function functionA(){ global $A; $A = "Declared as global inside functionA"; } // end fcn callGlobal echo "<p>This is A after functionA is called: {$A}</p>"; ?> Results: Notice: Undefined variable: A in /home/essma/public_html/global_test.php on line 3 This is A before functionA is called: . This is A after functionA is called: Declared as global inside functionA ---- Server IP: 45.112.84.4 Probable Submitter: 45.91.157.134 (proxied: 136.38.151.185) ---- Manual Page -- https://php.net/manual/en/language.variables.scope.php Edit -- https://main.php.net/note/edit/129208 Del: integrated -- https://main.php.net/note/delete/129208/integrated Del: useless -- https://main.php.net/note/delete/129208/useless Del: bad code -- https://main.php.net/note/delete/129208/bad+code Del: spam -- https://main.php.net/note/delete/129208/spam Del: non-english -- https://main.php.net/note/delete/129208/non-english Del: in docs -- https://main.php.net/note/delete/129208/in+docs Del: other reasons-- https://main.php.net/note/delete/129208 Reject -- https://main.php.net/note/reject/129208 Search -- https://main.php.net/manage/user-notes.php