* @link http://pear.php.net/manual/en/core.pear.pear-error.php
* @see PEAR::raiseError(), PEAR::throwError()
* @since Class available since PHP 4.0.2
* @link http://pear.php.net/manual/en/core.pear.pear-error.php
* @see PEAR::raiseError(), PEAR::throwError()
* @since Class available since PHP 4.0.2