Doc #80482 [Opn]: Undocumented behavior of array_walk with objects

Edit report at https://bugs.php.net/bug.php?id=80482&edit=1 ID: 80482 Updated by: requinix@php.net Reported by: php4fan at gmail dot com Summary: Undocumented behavior of array_walk with objects Status: Open Type: Documentation Problem -Package: Documentation problem +Package: Arrays related Operating System: all PHP Version: Irrelevant Block user comment: N Private report: N New Comment: There has been no change in how array_walk behaves. This is entirely due to a change in how ArrayObject behaves. Why should array_walk's documentation try to cover nuances of how unrelated classes work? It's not like string functions have comments when some class's __toString implementations change. Previous Comments: ------------------------------------------------------------------------ [2020-12-03 17:45:11] php4fan at gmail dot com Description: ------------ --- From manual page: https://php.net/function.array-walk --- The documentation says that the first parameter of array_walk must be an array, but in reality it also works when passed an object, and it iterates over the properties. Also, when used on ArrayObject (which, again, is undocumented in itself), this function is affected by a dramatic bc-breaking change in 7.4 that is described in the migration guide: https://www.php.net/manual/en/migration74.incompatible.php#migration74.incompatible.spl (there's no specific mention of array_walk but I guess it falls under "etc." and "potentially others") Namely, when calling array_walk() on an array object, prior to 7.4 it would iterate over the wrapped array/object, while starting from 7.4 it iterates over the properties of the ArrayObject itself. This should be documented in From manual page: https://php.net/function.array-walk Test script: --------------- . Expected result: ---------------- . Actual result: -------------- . ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80482&edit=1