Online PHP editor | output for RiOcF

@ 2019-09-11T10:47:36Z

<?php

final class Thing
{
    private string $state;
    public function __construct()
    {
        $this->state = 'foo';
    }
    public function __set(string $property, $value) : void
    {
        if ((\debug_backtrace()[1]['object'] ?? null) !== $this) {
            throw new \Exception('nope');
        }
            
        $this->$property = $value;
    }
}

$thing = new Thing();

var_dump($thing);

$thing->state = 'this should never be allowed';

Output for 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 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: object(Thing)#1 (1) { ["state":"Thing":private]=> string(3) "foo" } Fatal error: Uncaught Exception: nope in /in/RiOcF:13 Stack trace: #0 /in/RiOcF(24): Thing->__set('state', 'this should nev...') #1 {main} thrown in /in/RiOcF on line 13
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: Parse error: syntax error, unexpected 'string' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/RiOcF on line 5
Process exited with code 255.

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