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<?php class Test { public function foo() { $x = ['foo', 'bar']; // The actual operation isn't important, just need to do something to turn the literal // strings into refcounted strings var_dump(__LINE__); debug_zval_dump($x[0]); $y = array_map(function($it) { return $it.$it; }, $x); var_dump(__LINE__); debug_zval_dump($x[0]); debug_zval_dump($y[0]); return array_unique($y, SORT_STRING); } } $result = (new Test())->foo(); var_dump(__LINE__); debug_zval_dump($result[0]); debug_zval_dump($result[1]); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
int(10) string(3) "foo" refcount(2) int(13) string(3) "foo" refcount(2) string(6) "foofoo" refcount(2) int(21) string(6) "foofoo" refcount(2) string(6) "barbar" refcount(2) array(2) { [0]=> string(6) "foofoo" [1]=> string(6) "barbar" }

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