$comment = new DOMComment('Testing character data and extending nodes');
$charnode->appendChild($comment);
echo "Comment Length: " . $comment->length . "\n";
$comment->data = 'Updated comment';
echo "New Comment Length: " . $comment->length . "\n";
echo "New Comment Data: " . $comment->data . "\n";
/* DOMCDataSection */
$cdata = new DOMCDataSection('Chars: <>&"');
$charnode->appendChild($cdata);
echo "Substring: " . $cdata->substringData(7, 4) . "\n";
$cdata->replaceData(10, 1, "'");
echo "New Substring: " . $cdata->substringData(7, 4) . "\n";
/* DOMCharacterData using DOMComment */
$comment = new DOMComment('instructions');
echo "Comment Value: " . $comment->data . "\n";
$comment->data = 'some more instructions';
echo "New Comment Value: " . $comment->data . "\n";
$comment->insertData(10, 'pi ');
$comment->replaceData(18, 5, 'i');
$comment->insertData(20, 'g');
$comment->deleteData(13, 2);
$comment->deleteData(10, 3);
$comment->insertData(10, 'comment ');
echo "Updated Comment Value: " . $comment->data . "\n";
/* DOMText */
$text = new DOMText('some text characters');
echo "Whole Text: " . $text->wholeText . "\n";
$text2 = $text->splitText(9);
echo "Split text: " . $text2->wholeText . "\n";
$text3 = $text2->splitText(1);
echo "Is Whitespace?: " . ($text2->isElementContentWhitespace() ? 'YES' : 'NO');
