filp/whoops · error · InvalidArgumentException

Invalid status code '$code', must be between 0 and 254

Error message

Invalid status code '$code', must be between 0 and 254

What it means

Error "Invalid status code '$code', must be between 0 and 254" thrown in filp/whoops.

Source

Thrown at src/Whoops/Run.php:346

    /**
     * Should Whoops exit with a specific code on the CLI if possible?
     * Whoops will exit with 1 by default, but you can specify something else.
     *
     * @param int $code
     *
     * @return int
     *
     * @throws InvalidArgumentException
     */
    public function sendExitCode($code = null)
    {
        if (func_num_args() == 0) {
            return $this->sendExitCode;
        }

        if ($code < 0 || 255 <= $code) {
            throw new InvalidArgumentException(
                "Invalid status code '$code', must be between 0 and 254"
            );
        }

        return $this->sendExitCode = (int) $code;
    }

    /**
     * Should Whoops push output directly to the client?
     * If this is false, output will be returned by handleException.
     *
     * @param bool|int $send
     *
     * @return bool
     */
    public function writeToOutput($send = null)
    {
        if (func_num_args() == 0) {

View on GitHub (pinned to fa1bc9c95a)

When it happens

Trigger: Thrown at src/Whoops/Run.php:346 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of filp/whoops@fa1bc9c95a (2026-08-21). Data as JSON: /api/errors/0f8648c540792462. Report an issue: GitHub.