Bug #73238 [Opn]: Function called from call_user_func() emits additional errors with newer PHPs

Edit report at https://bugs.php.net/bug.php?id=73238&edit=1 ID: 73238 Updated by: nikic@php.net Reported by: yohgaki@php.net Summary: Function called from call_user_func() emits additional errors with newer PHPs Status: Open Type: Bug Package: Unknown/Other Function Operating System: Irrelevant PHP Version: 7.0.11 Block user comment: N Private report: N New Comment: These changes are intentional -- they bring the call_user_func VM implementation in line with the actual function. call_user_func() categorically cannot pass references, so you get a warning. (At least this is part of it.) However, in PHP 7.1 we have changed call_user_func() to still proceed with the call even if such a warning occurs. Previously the call would be aborted (which would be a BC break). Now it will continue as normal, only with the warning. Previous Comments: ------------------------------------------------------------------------ [2016-10-10 22:10:50] yohgaki@php.net More test code https://3v4l.org/TZaVe (array) https://3v4l.org/WMMQa (string) https://3v4l.org/OEOA1 (return value check) Removing error from call_user_func('foo', $value), when $value is object, is preferred. foo() could be. function foo(&$value) { if (is_string($value)) { $value = 'update $value'; } else if (is_object($value)) { $value->some_var = 'add some_var'; } else { trigger_error('You should pass string or object'); } } ------------------------------------------------------------------------ [2016-10-04 01:10:04] yohgaki@php.net Description: ------------ As you can see, newer PHPs have additional errors with call_user_func(). https://3v4l.org/oBnkT Warning: Parameter 1 to foo() expected to be a reference, value given in /in/oBnkT on line 10 Warning: Parameter 1 to foo() expected to be a reference, value given in /in/oBnkT on line 11 I found this errors from Wordpress installation. https://wordpress.org/support/topic/wp-4-6-1-got-error-with-php-7-1/ ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=73238&edit=1