RFC Tracker

Adds a |>= operator so $x |>= trim(...) pipes a variable through a function and assigns the result back.

Function autoloading modeled on class autoloading, with no cost to calls that resolve normally.

Adds an opt-in __exists() magic method that says if a magic property exists, separate from whether it's null, used by isset(), empty() and ??.

Adds array_path_get() and array_path_exists() to read or check a value deep in a nested array using an array of keys.

Adds array_only_keys() and array_except_keys() to keep or drop the listed keys of an array without the array_flip() workaround.

Lets a constructor reassign a promoted readonly property exactly once, so you can validate or normalize it without dropping promotion.

Adds six str_prefix_* and str_suffix_* functions to ensure, remove or replace a string's prefix or suffix in one call.