Online PHP editor | output for I5phk

@ 2025-08-06T15:28:17Z

<?php

class ImmutableClass {
    public function __construct(
        public readonly OtherClass $readonly_property,
    ) {}
}

class OtherClass {
    public function __construct(
        public int $foo = 0,
        public ?string $bar = null,
    ) {}
}

$object = new OtherClass();
$object->foo = 500;

$immutable_object = new ImmutableClass(readonly_property: $object);

var_dump($immutable_object->readonly_property);

$immutable_object->readonly_property->foo = 100;
$immutable_object->readonly_property->bar = 'oops';

var_dump($immutable_object->readonly_property);

Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: object(OtherClass)#1 (2) { ["foo"]=> int(500) ["bar"]=> NULL } object(OtherClass)#1 (2) { ["foo"]=> int(100) ["bar"]=> string(4) "oops" }
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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