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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 = $arr1; debug_zval_dump('arr2'); key($arr2); debug_zval_dump('arr2');
Output for git.master, rfc.property-hooks
string(4) "arr2" interned string(4) "arr2" interned string(4) "arr2" interned string(4) "arr2" interned
Output for git.master_jit
string(4) "arr2" refcount(2) string(4) "arr2" refcount(2) string(4) "arr2" refcount(2) string(4) "arr2" refcount(2)

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