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run code in 300+ PHP versions simultaneously

@ 2023-10-05T00:44:03Z

<?php
class Car 
{
    protected array $tags;

    public function __get(string $prop): mixed
    {
        print("__get($prop) called");
        if (property_exists($this, $prop)) {
            return $this->{$prop};
        }
    }

    public function __set(string $prop, mixed $val): void
    {
        if (property_exists($this, $prop)) {
            $this->$prop = $val;
        }
    }
}

class CarMapper
{
    public function test(Car $car): void
    {
        echo 'そのままだとtrueになる'.PHP_EOL;
        var_dump(empty($car->tags)); // bool(true)

        echo '代入するとfalseになる'.PHP_EOL;
        $tags = $car->tags;
        var_dump(empty($tags)); // bool(false)
    }
}

$car = new Car();
$car->tags = ['tag1'];
$carMapper = new CarMapper();
$carMapper->test($car);

Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: そのままだとtrueになる bool(true) 代入するとfalseになる __get(tags) calledbool(false)
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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