#26032 [Com]: return in included files as not always the same behaviour

ID: 26032 Comment by: christian dot lefebvre at atosorigin dot com Reported By: kevin at hatry dot com Status: Open Bug Type: Documentation problem Operating System: irrelevant PHP Version: 4.3.2 New Comment: I'm testing php5 and I obtain what you expect as result, but i'd like the opposite :-) A lot of old php code use conditionnal return at beginning of includefiles to simulate include_once behavior. And this tips works no more with php5 because all declared functions raise "already defined" errors. See my comments on http://bugs.php.net/bug.php?id=18590 for details Previous Comments: ------------------------------------------------------------------------ [2003-10-29 17:16:34] kevin at hatry dot com Description: ------------ First i'll describe the more or less documented way of doing: - When putting a return in an included file, the execution of the file stops and returns to the parent file (all normal), but functions defined in the included file are nontheless put in the environnement (they are callable in the parent file). OK i understand that: functions are added in the environnement at parsing time (so before execution time). - When including two times the same file which defines a function, i get a fatal error saying the function is already defined. (which is normal). But when you mix both, ie: an included file defining a function with a return at the beginning and that you include that file two times you dont have the fatal error: php seems to ignore the second declarations. Of course the example is trivial but it wotks the same if the includes are done in separate files. A last remark: if you add code after the return, it will never be executed (that's normal) whereas the function will exists which is disturbing : i spent half an hour wondering why my $GLOBALS affectation put after the return (which was in an if statement) didnt appear even when i could use the function ! Even if it's not considered as a bug i think it should be properly documented. Thanks. Reproduce code: --------------- <?php // this is the included file: "inc.php" ************** return; function dummy () { return 2; } ?> and, the main file: <?php require('./inc.php'); require('./inc.php'); if( function_exists('dummy') ) { echo 'function: yes'."\n"; } else { echo 'function: no'."\n"; } ?> Expected result: ---------------- Fatal error: Cannot redeclare dummy() (previously declared in inc.php:5) in inc.php on line 5 Actual result: -------------- if the return statement is left uncommented: function: yes so the function exists despite the return. if the return statement is commented: Fatal error: Cannot redeclare dummy() (previously declared in inc.php:5) in inc.php on line 5 which should be the normal behaviour in both cases, i think. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=26032&edit=1