Seldaek/monolog · error · MissingExtensionException

The OpenSSL PHP extension is required to use the SlackHandle

Error message

The OpenSSL PHP extension is required to use the SlackHandler

What it means

Error "The OpenSSL PHP extension is required to use the SlackHandler" thrown in Seldaek/monolog.

Source

Thrown at src/Monolog/Handler/SlackHandler.php:67

    public function __construct(
        string $token,
        string $channel,
        ?string $username = null,
        bool $useAttachment = true,
        ?string $iconEmoji = null,
        $level = Level::Critical,
        bool $bubble = true,
        bool $useShortAttachment = false,
        bool $includeContextAndExtra = false,
        array $excludeFields = [],
        bool $persistent = false,
        float $timeout = 0.0,
        float $writingTimeout = 10.0,
        ?float $connectionTimeout = null,
        ?int $chunkSize = null
    ) {
        if (!\extension_loaded('openssl')) {
            throw new MissingExtensionException('The OpenSSL PHP extension is required to use the SlackHandler');
        }

        parent::__construct(
            'ssl://slack.com:443',
            $level,
            $bubble,
            $persistent,
            $timeout,
            $writingTimeout,
            $connectionTimeout,
            $chunkSize
        );

        $this->slackRecord = new SlackRecord(
            $channel,
            $username,
            $useAttachment,
            $iconEmoji,

View on GitHub (pinned to 57eb102834)

When it happens

Trigger: Thrown at src/Monolog/Handler/SlackHandler.php:67 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/28a0aa1a7948fe46. Report an issue: GitHub.