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<?php $a = [42]; $b = []; $b[] = 42; debug_zval_dump([42], $a, $b);
Output for 8.4.1 - 8.4.12
array(1) packed refcount(2){ [0]=> int(42) } array(1) packed refcount(3){ [0]=> int(42) } array(1) packed refcount(2){ [0]=> int(42) }
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25
array(1) refcount(2){ [0]=> int(42) } array(1) refcount(3){ [0]=> int(42) } array(1) refcount(2){ [0]=> int(42) }

preferences:
147.24 ms | 408 KiB | 5 Q