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--TEST-- SPL: ArrayObject::exchangeArray() basic usage with object as underlying data store. --FILE-- <?php class C { public $pub1 = 'public1'; } echo "--> exchangeArray() with objects:\n"; $original = new C; $ao = new ArrayObject($original); $swapIn = new C; try { $copy = $ao->exchangeArray($swapIn); $copy['addedToCopy'] = 'added To Copy'; } catch (Exception $e) { echo "Exception:" . $e->getMessage() . "\n"; } $swapIn->addedToSwapIn = 'added To Swap-In'; $original->addedToOriginal = 'added To Original'; var_dump($ao, $original, $swapIn, $copy); echo "\n\n--> exchangeArray() with no arg:\n"; unset($original, $ao, $swapIn, $copy); $original = new C; $ao = new ArrayObject($original); try { $copy = $ao->exchangeArray(); $copy['addedToCopy'] = 'added To Copy'; } catch (Exception $e) { echo "Exception:" . $e->getMessage() . "\n"; } $original->addedToOriginal = 'added To Original'; var_dump($ao, $original, $copy); echo "\n\n--> exchangeArray() with bad arg type:\n"; unset($original, $ao, $swapIn, $copy); $original = new C; $ao = new ArrayObject($original); try { $copy = $ao->exchangeArray(null); $copy['addedToCopy'] = 'added To Copy'; } catch (Exception $e) { echo "Exception:" . $e->getMessage() . "\n"; } $original->addedToOriginal = 'added To Original'; var_dump($ao, $original, $copy); ?> --EXPECTF-- --> exchangeArray() with objects: object(ArrayObject)#2 (1) { ["storage":"ArrayObject":private]=> object(C)#3 (2) { ["pub1"]=> string(7) "public1" ["addedToSwapIn"]=> string(16) "added To Swap-In" } } object(C)#1 (2) { ["pub1"]=> string(7) "public1" ["addedToOriginal"]=> string(17) "added To Original" } object(C)#3 (2) { ["pub1"]=> string(7) "public1" ["addedToSwapIn"]=> string(16) "added To Swap-In" } array(2) { ["pub1"]=> string(7) "public1" ["addedToCopy"]=> string(13) "added To Copy" } --> exchangeArray() with no arg: Warning: ArrayObject::exchangeArray() expects exactly 1 parameter, 0 given in %s on line 27 object(ArrayObject)#2 (1) { ["storage":"ArrayObject":private]=> object(C)#3 (2) { ["pub1"]=> string(7) "public1" ["addedToOriginal"]=> string(17) "added To Original" } } object(C)#3 (2) { ["pub1"]=> string(7) "public1" ["addedToOriginal"]=> string(17) "added To Original" } array(2) { ["pub1"]=> string(7) "public1" ["addedToCopy"]=> string(13) "added To Copy" } --> exchangeArray() with bad arg type: Exception:Passed variable is not an array or object, using empty array instead Notice: Undefined variable: copy in %s on line 46 object(ArrayObject)#3 (1) { ["storage":"ArrayObject":private]=> object(C)#2 (2) { ["pub1"]=> string(7) "public1" ["addedToOriginal"]=> string(17) "added To Original" } } object(C)#2 (2) { ["pub1"]=> string(7) "public1" ["addedToOriginal"]=> string(17) "added To Original" } NULL