RFC Tracker

Lets clone() take an array of properties to change on the copy, so you can update readonly properties in with-er methods.

Adds str_icontains(), a case-insensitive version of str_contains() that folds ASCII letters only.

Lets you mark a promoted constructor parameter as final, making the promoted property final without extra boilerplate.

Adds ? and ... placeholders to function calls, so passing only some arguments returns a closure that takes the rest later.

Adds an official policy for how PHP extensions name, structure and throw exceptions, based on the ext/random design.

Adds the |> pipe operator, which passes the value on its left as the single argument to the callable on its right.

Adds an always-on URI extension with Uri\Rfc3986\Uri and Uri\WhatWg\Url classes for standards-compliant URL parsing, instead of parse_url().

Lets you declare classes and enums inside other classes, with public, protected or private visibility, referenced as Outer\Inner.

Updates the PHP release policy to define BC breaks, clarify what each version type may change, and let most features land via pull request.

Adds array_first() and array_last() to return an array's first and last values, or null when the array is empty.

Lets interface and abstract methods use never as a parameter type, so implementations can pick any type, and uses it for BackedEnum::from().

Adds grapheme_levenshtein() to intl, which measures edit distance by visible characters so combined accents and variation selectors compare right.

Sets out which backward compatibility breaks are allowed in a PHP minor release, and which have to wait for a major one.

Makes sort(), usort(), shuffle(), array_walk() and similar functions return the sorted array instead of always returning true.

Lets a class mark an interface with ? in its implements list, so it only implements that interface if it exists.

Adds get_error_handler() and get_exception_handler() so you can read the current handlers without setting and restoring them.

Adds mb_levenshtein() to mbstring so the Levenshtein edit distance is counted in Unicode code points instead of bytes.

Adds a #[\NoDiscard] attribute that warns when a call ignores a function's return value, plus a (void) cast to ignore it on purpose.

Extends asymmetric visibility, like public private(set), to static properties.

Adds a let() construct that scopes variables to a block and restores or unsets them when it ends, even if an exception is thrown.