--TEST-- SPL: ArrayObject --FILE-- 0, 1=>1); $ar = new ArrayObject($ar); var_dump($ar); $ar[2] = 2; var_dump($ar[2]); var_dump($ar["3"] = 3); var_dump(array_merge((array)$ar, array(4=>4, 5=>5))); var_dump($ar["a"] = "a"); var_dump($ar); var_dump($ar[0]); var_dump($ar[6]); var_dump($ar["b"]); unset($ar[1]); unset($ar["3"]); unset($ar["a"]); unset($ar[7]); unset($ar["c"]); var_dump($ar); $ar[] = '3'; $ar[] = 4; var_dump($ar); ?> ===DONE=== --EXPECTF-- object(ArrayObject)#%d (1) { ["storage":"ArrayObject":private]=> array(2) { [0]=> int(0) [1]=> int(1) } } int(2) int(3) array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> int(5) } string(1) "a" object(ArrayObject)#%d (1) { ["storage":"ArrayObject":private]=> array(5) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(3) ["a"]=> string(1) "a" } } int(0) Notice: Undefined offset: 6 in %sarray_001.php on line %d NULL Notice: Undefined index: b in %sarray_001.php on line %d NULL Notice: Undefined offset: 7 in %sarray_001.php on line %d Notice: Undefined index: c in %sarray_001.php on line %d object(ArrayObject)#%d (1) { ["storage":"ArrayObject":private]=> array(2) { [0]=> int(0) [2]=> int(2) } } object(ArrayObject)#%d (1) { ["storage":"ArrayObject":private]=> array(4) { [0]=> int(0) [2]=> int(2) [4]=> string(1) "3" [5]=> int(4) } } ===DONE===