#24931 [Ver->Bgs]: call_user_func ignores requirement of references

ID: 24931 Updated by: iliaa@php.net Reported By: rehsack at liwing dot de -Status: Verified +Status: Bogus Bug Type: Scripting Engine problem Operating System: FreeBSD 5.1 i386 PHP Version: 4.3.3RC2, 5.0.0b2-dev New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php $id is modified because the original $id passed to call_user_func() is not being passed by reference. Previous Comments: ------------------------------------------------------------------------ [2003-08-04 03:22:31] rehsack at liwing dot de Description: ------------ The method call_user_func ignores requirement of called function takes it's arguments as reference. The results in several times very ugly and hard to find bugs, eg. if you use a template pattern combined with composite to control child templates and want to do an action in each child object and require to work on current data copy. Either, if call_user_func internally is able to be called by reference, some programs could be speed up, too (because of the loose of expensive string copies) This bug may related to #24631 but seems to have another background. I can submit a more complicated example using templates and a composite object to illustrate the problem. Enabling call-time references in php.ini would solve this problem by don't write a warning but I don't think it's a good way to solve... Reproduce code: --------------- <?PHP function nextId( &$id ) { $id += 1; } $id = 1; echo "before call_user_func id=$id\n"; call_user_func( "nextId", $id ); echo "after call_user_func id=$id\n"; call_user_func_array( "nextId", array( &$id ) ); echo "after call_user_func_array id=$id\n"; ?> Expected result: ---------------- before call_user_func id=1 after call_user_func id=2 after call_user_func_array id=3 Actual result: -------------- before call_user_func id=1 after call_user_func id=1 after call_user_func_array id=2 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=24931&edit=1