php-src/Zend/tests/lazy_objects/fetch_hook_virtual_may_initialize.phpt

--TEST--
Lazy objects: virtual hooked property fetch may initialize object if hook observes object state
--FILE--
<?php

class C {
    public $_a;
    public $a {
        &get { return $this->_a; }
    }
    public int $b = 1;

    public function __construct(int $a) {
        var_dump(__METHOD__);
        $this->_a = $a;
        $this->b = 2;
    }
}

function test(string $name, object $obj) {
    printf("# %s:\n", $name);

    var_dump($obj);
    $a = &$obj->a;
    var_dump($a);
    var_dump($obj);
}

$reflector = new ReflectionClass(C::class);

$obj = $reflector->newLazyGhost(function ($obj) {
    var_dump("initializer");
    $obj->__construct(1);
});

test('Ghost', $obj);

$obj = $reflector->newLazyProxy(function ($obj) {
    var_dump("initializer");
    return new C(1);
});

test('Proxy', $obj);

--EXPECTF--
# Ghost:
lazy ghost object(C)#%d (0) {
  ["b"]=>
  uninitialized(int)
}
string(11) "initializer"
string(14) "C::__construct"
int(1)
object(C)#%d (2) {
  ["_a"]=>
  &int(1)
  ["b"]=>
  int(2)
}
# Proxy:
lazy proxy object(C)#%d (0) {
  ["b"]=>
  uninitialized(int)
}
string(11) "initializer"
string(14) "C::__construct"
int(1)
lazy proxy object(C)#%d (1) {
  ["instance"]=>
  object(C)#%d (2) {
    ["_a"]=>
    &int(1)
    ["b"]=>
    int(2)
  }
}