--- Catch exception with try/catch
object(DOMException)#3 (6) {
  ["message:protected"]=>
  string(23) "Hierarchy Request Error"
  ["string:private"]=>
  string(0) ""
  ["file:protected"]=>
  string(49) "/usr/local/src/php-5.0.4/ext/dom/tests/dom003.php"
  ["line:protected"]=>
  int(8)
  ["trace:private"]=>
  array(1) {
    [0]=>
    array(6) {
      ["file"]=>
      string(49) "/usr/local/src/php-5.0.4/ext/dom/tests/dom003.php"
      ["line"]=>
      int(8)
      ["function"]=>
      string(11) "appendChild"
      ["class"]=>
      string(10) "DOMElement"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(1) {
        [0]=>
        object(DOMElement)#2 (0) {
        }
      }
    }
  }
  ["code"]=>
  int(3)
}
--- Don't catch exception with try/catch

Fatal error: Uncaught exception 'DOMException' with message 'Hierarchy Request Error' in /usr/local/src/php-5.0.4/ext/dom/tests/dom003.php:13
Stack trace:
#0 /usr/local/src/php-5.0.4/ext/dom/tests/dom003.php(13): DOMElement->appendChild(Object(DOMElement))
#1 {main}
  thrown in /usr/local/src/php-5.0.4/ext/dom/tests/dom003.php on line 13