throw exception in php extension.

throw exception.c

zval ex, info;
zend_class_entry *def_ex = zend_ce_exception, *pdo_ex = zend_ce_exception;

object_init_ex(&ex, pdo_ex);

zend_update_property_string(def_ex, &ex, "message", sizeof("message")-1, message);
zend_update_property_string(def_ex, &ex, "code", sizeof("code")-1, *pdo_err);

array_init(&info);

add_next_index_string(&info, *pdo_err);
add_next_index_long(&info, 0);
zend_update_property(pdo_ex, &ex, "errorInfo", sizeof("errorInfo")-1, &info);
zval_ptr_dtor(&info);

zend_throw_exception_object(&ex);