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