Zend Framework 1.10.9 Manual

Zend_Exception is the base class for all exceptions thrown by Zend Framework. This class extends the base Exception class of PHP.

try {
    // your code
} catch (Zend_Exception $e) {
    // do something
}

try {
    // your code
} catch (Zend_Db_Exception $e) {
    // do something
}