Re: [RFC] array_only() and ar ray_except() – Utility functions for array key fi ltering

> Le 20 févr. 2026 à 10:25, Muhammed Arshid KV <arshidkv12@gmail.com> a écrit : > > Hello Internals, > > I would like to propose a new RFC titled array_only() and array_except(). > > RFC: https://wiki.php.net/rfc/array_only_except > <https://wiki.php.net/rfc/array_only_except?utm_source=chatgpt.com> > This RFC proposes adding two utility functions to the PHP core: > > • array_only(array $array, array $keys): array > • array_except(array $array, array $keys): array > > These functions allow selecting or excluding specific keys from an array. > > Similar helpers are commonly used in frameworks, and adding native support would improve > readability and consistency in userland code. > > Summary: > > • array_only() returns a new array containing only the specified keys. > • array_except() returns a new array excluding the specified keys. > • Original array is not modified. > • Works with associative and numeric keys. > • No impact on SAPIs or on OPcache. > > I would appreciate feedback and suggestions from the community. > If there is general agreement, I plan to move the RFC forward. > > Thanks, > Muhammed Arshid KV > Hi, The principle of the RFC is interesting to me, as it is a situation I encounter from time to time. Two remarks: 1. It may be interesting to compare with currently available solutions. Currently, I use array_intersect_key and array_diff_key when I need the semantics of proposed array_only and array_except: ```php array_intersect_key($data, ['id' => null, 'email' => null]); ``` 2. I think that the name of the new functions ought to make evident that we are filtering on keys and not on something else. I suggest: array_only_keys and array_except_keys. —Claude