--TEST-- NodeList dimensions --EXTENSIONS-- dom --FILE-- '); $children = $dom->documentElement->childNodes; $test_values = [-1, 0, 1, 2, 3, 1.0, 1.1, true, null, "0", "1", "", "foo"]; foreach ($test_values as $value) { echo "--- ", json_encode($value), " ---\n"; try { var_dump($children[$value] ? $children[$value]->nodeName : "N/A", isset($children[$value]), empty($children[$value])); } catch (Error $e) { echo $e->getMessage(), "\n"; } } ?> --EXPECTF-- --- -1 --- string(3) "N/A" bool(false) bool(true) --- 0 --- string(1) "a" bool(true) bool(false) --- 1 --- string(1) "b" bool(true) bool(false) --- 2 --- string(1) "c" bool(true) bool(false) --- 3 --- string(3) "N/A" bool(false) bool(true) --- 1 --- string(1) "b" bool(true) bool(false) --- 1.1 --- Deprecated: Implicit conversion from float 1.1 to int loses precision in %s on line %d Deprecated: Implicit conversion from float 1.1 to int loses precision in %s on line %d Deprecated: Implicit conversion from float 1.1 to int loses precision in %s on line %d Deprecated: Implicit conversion from float 1.1 to int loses precision in %s on line %d string(1) "b" bool(true) bool(false) --- true --- Cannot access offset of type bool on Dom\NodeList --- null --- Cannot access offset of type null on Dom\NodeList --- "0" --- string(1) "a" bool(true) bool(false) --- "1" --- string(1) "b" bool(true) bool(false) --- "" --- Cannot access offset of type string on Dom\NodeList --- "foo" --- Cannot access offset of type string on Dom\NodeList