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<?php $a = new stdClass; $b = $a; $a->foo = 'bar'; var_dump($b); /* Notice at this point, that $a and $b are, * indeed sharing the same object instance. * This is their reference-like behavior at work. */ $a = 'baz'; var_dump($b); /* Notice now, that $b is still that original object. * Had it been an actual reference with $a, * it would have changed to a simple string as well. */ ?>
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
object(stdClass)#1 (1) { ["foo"]=> string(3) "bar" } object(stdClass)#1 (1) { ["foo"]=> string(3) "bar" }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
object(stdClass)(0) { } object(stdClass)(0) { }

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316.34 ms | 401 KiB | 463 Q