FS-7783 Add channel variable for capturing DTMF input when using…

FS-7783 Add channel variable for capturing DTMF input when using play_and_get_digits when the response does not match

src/switch_ivr_play_say.c

@@ -2174,14 +2174,21 @@ SWITCH_DECLARE(switch_status_t) switch_play_and_get_digits(switch_core_session_t
 		if (!(status == SWITCH_STATUS_TOO_SMALL && strlen(digit_buffer) == 0)) {
 			if (status == SWITCH_STATUS_SUCCESS) {
 				if (!zstr(digit_buffer)) {
+					char *invalid_var = NULL;
 					if (zstr(digits_regex)) {
 						return SWITCH_STATUS_SUCCESS;
 					}
 					switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG1, "Test Regex [%s][%s]\n", digit_buffer, digits_regex);
+
+					invalid_var = switch_mprintf("%s_invalid", var_name);
 					if (switch_regex_match(digit_buffer, digits_regex) == SWITCH_STATUS_SUCCESS) {
+						switch_channel_set_variable(channel, invalid_var, NULL);
+						switch_safe_free(invalid_var);
 						return SWITCH_STATUS_SUCCESS;
 					} else {
 						switch_channel_set_variable(channel, var_name, NULL);
+						switch_channel_set_variable(channel, invalid_var, digit_buffer);
+						switch_safe_free(invalid_var);
 					}
 				}
 			}