Online PHP editor | rfc for Cks3J

@ 2025-12-03T05:47:20Z

<?php

class Foo
{
    private const string PREFIX = "Hello. ";

    private static string $prefix = "Hello, ";
    
    private static function prefix(): string
    {
        return "Hello, ";
    }

    public function greetFunc(string $to): string
    {
        return self::prefix() . $to . "!";  // OK, but unnecessary LSB
    }

    public function greetVar(string $to): string
    {
        return self::$prefix . $to . "!";  // OK, but unnecessary LSB
    }

    public function greetConst(string $to): string
    {
        return static::PREFIX . $to . "!";  // It should be self::PREFIX.
    }
}

class Bar extends Foo
{
}

echo (new Bar())->greetFunc("World") . PHP_EOL;
echo (new Bar())->greetVar("World") . PHP_EOL;
// echo (new Bar())->greetConst("World") . PHP_EOL;  // Error! Referencing undefined Bar::PREFIX...


class Buz extends Foo
{
    protected static string $prefix = "Hi, ";

    protected static function prefix(): string
    {
        return "Hi, ";
    }
}

echo (new Buz())->greetFunc("World") . PHP_EOL;  // No! private function was actually overridden!!
echo (new Buz())->greetVar("World") . PHP_EOL;  // No! private property was actually overridden!!

Output for git.master, git.master_jit: Hello, World! Hello, World! Hello, World! Hello, World!

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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