Fatal error: Uncaught Error: Interface 'Zend_Stdlib_Exception' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Zend\Stdlib\Exception\InvalidCallbackException.php:31 Stack trace: #0 {main} thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Zend\Stdlib\Exception\InvalidCallbackException.php on line 31