3v4l.org

run code in 300+ PHP versions simultaneously

@ 2025-12-03T05:34:55Z

<?php

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

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

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

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

    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;  // Actually using Foo::prefix() instead of Bar::prefix()
echo (new Bar())->greetVar("World") . PHP_EOL;  // Referencing undefined Bar::$prefix...
echo (new Bar())->greetConst("World") . PHP_EOL;  // Referencing undefined Bar::PREFIX...

Output for git.master, git.master_jit: Hello, World! Hello, World! Fatal error: Uncaught Error: Undefined constant Bar::PREFIX in /in/rZk6Z:26 Stack trace: #0 /in/rZk6Z(36): Foo->greetConst('World') #1 {main} thrown in /in/rZk6Z on line 26
Process exited with code 255.

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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

preferences:dark modelive previewkey bindings

39.45 ms | 405 KiB | 5 Q