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<?php Class A {} $a = new A; $b = $a; // Passed by identifier $a = null; var_dump($b); $a2 = new A; $b2 = &$a; // Passed by reference $a2 = null; var_dump($b2);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
object(A)#1 (0) { } NULL
preferences:
72.46 ms | 406 KiB | 5 Q