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<?php $arr1 = [1,2,3]; $arr2 = $arr1; debug_zval_dump($arr2); key($arr2); debug_zval_dump($arr2); unset($arr1); unset($arr2); $arr1 = [1,2,3]; $arr2 = $arr1; debug_zval_dump($arr2); end($arr2); debug_zval_dump($arr2);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) refcount(4){ [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) refcount(4){ [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) refcount(4){ [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) refcount(2){ [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 7.0.0 - 7.0.20
array(3) refcount(3){ [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) refcount(3){ [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) refcount(3){ [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) refcount(2){ [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
array(3) refcount(3){ [0]=> long(1) refcount(1) [1]=> long(2) refcount(1) [2]=> long(3) refcount(1) } array(3) refcount(2){ [0]=> long(1) refcount(2) [1]=> long(2) refcount(2) [2]=> long(3) refcount(2) } array(3) refcount(3){ [0]=> long(1) refcount(1) [1]=> long(2) refcount(1) [2]=> long(3) refcount(1) } array(3) refcount(2){ [0]=> long(1) refcount(2) [1]=> long(2) refcount(2) [2]=> long(3) refcount(2) }

preferences:
190.97 ms | 403 KiB | 228 Q