A useful video tutorial on how to setup unit testing with the Zend Framework using Eclipse PDT or Zend Studio:
This may be caused by the
PHP_PEAR_PHP_BIN environment variable not being set correctly.
To fix this go to Advanced System Settings in Control Panel/System & Maintenance/System.
Select Environment Variables.
PHP_PEAR_PHP_BIN and change the value from
./php.exe to the correct path\to\php.exe on your system.
To reference the next sibling nodes in a SimpleXMLElement object in PHP you can use the xpath axes “following-sibling” as shown below:
$nextSibling = $element->xpath("following-sibling::ElementName");
To reference the first sibling following the element:
$firstSiblingElement = $nextSibling;
Reference: XPath Axes