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<?php $obj = new stdClass; $ref = 42; $obj->ref =& $ref; $clone = clone $obj; $clone->ref = 24; var_dump($obj, $clone);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
object(stdClass)#1 (1) { ["ref"]=> &int(24) } object(stdClass)#2 (1) { ["ref"]=> &int(24) }
preferences:
138.83 ms | 408 KiB | 5 Q