Online PHP editor | output for nSJIF

@ 2021-06-28T08:58:28Z

<?php

interface A
{
    public function foo(string $s): string;

    public function bar(int $i): int;
}

// Абстрактный класс может реализовывать только часть интерфейса.
// Классы, расширяющие абстрактный класс, должны реализовать все остальные.
abstract class B implements A
{
    public function foo(string $s): string
    {
        return $s . PHP_EOL;
    }
}

class C extends B
{
    public function bar(int $i): int
    {
        return $i * 2;
    }
}

$c = new C();
echo $c->bar(2);        // OK, 4

$b = new B();
$b->foo("123");

Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.4, 8.3.6 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: 4 Fatal error: Uncaught Error: Cannot instantiate abstract class B in /in/nSJIF:31 Stack trace: #0 {main} thrown in /in/nSJIF on line 31
Process exited with code 255.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 4 Fatal error: Uncaught Error: Cannot instantiate abstract class B in /in/nSJIF:31 Stack trace: #0 {main} thrown in /in/nSJIF on line 31
Process exited with code 255.

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