Seldaek/monolog · error · UnexpectedValueException

Unknown facility value "${facility}" given

Error message

Unknown facility value "${facility}" given

What it means

Error "Unknown facility value "${facility}" given" thrown in Seldaek/monolog.

Source

Thrown at src/Monolog/Handler/AbstractSyslogHandler.php:82

            $this->facilities['local5'] = \LOG_LOCAL5;
            $this->facilities['local6'] = \LOG_LOCAL6;
            $this->facilities['local7'] = \LOG_LOCAL7;
        } else {
            $this->facilities['local0'] = 128; // LOG_LOCAL0
            $this->facilities['local1'] = 136; // LOG_LOCAL1
            $this->facilities['local2'] = 144; // LOG_LOCAL2
            $this->facilities['local3'] = 152; // LOG_LOCAL3
            $this->facilities['local4'] = 160; // LOG_LOCAL4
            $this->facilities['local5'] = 168; // LOG_LOCAL5
            $this->facilities['local6'] = 176; // LOG_LOCAL6
            $this->facilities['local7'] = 184; // LOG_LOCAL7
        }

        // convert textual description of facility to syslog constant
        if (\is_string($facility) && \array_key_exists(strtolower($facility), $this->facilities)) {
            $facility = $this->facilities[strtolower($facility)];
        } elseif (!\in_array($facility, array_values($this->facilities), true)) {
            throw new \UnexpectedValueException('Unknown facility value "'.$facility.'" given');
        }

        $this->facility = $facility;
    }

    /**
     * @inheritDoc
     */
    protected function getDefaultFormatter(): FormatterInterface
    {
        return new LineFormatter('%channel%.%level_name%: %message% %context% %extra%');
    }
}

View on GitHub (pinned to 57eb102834)

When it happens

Trigger: Thrown at src/Monolog/Handler/AbstractSyslogHandler.php:82 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Seldaek/monolog@57eb102834 (2026-08-17). Data as JSON: /api/errors/d5e3884277435c7d. Report an issue: GitHub.