slimphp/Slim · error · RuntimeException

Callable %s does not exist

Error message

Callable %s does not exist

What it means

Error "Callable %s does not exist" thrown in slimphp/Slim.

Source

Thrown at Slim/CallableResolver.php:144

     * @return array{object, string|null} [Instance, Method Name]
     */
    private function resolveSlimNotation(string $toResolve): array
    {
        /** @psalm-suppress ArgumentTypeCoercion */
        preg_match(CallableResolver::$callablePattern, $toResolve, $matches);
        [$class, $method] = $matches ? [$matches[1], $matches[2]] : [$toResolve, null];

        if ($this->container && $this->container->has($class)) {
            $instance = $this->container->get($class);
            if (!is_object($instance)) {
                throw new RuntimeException(sprintf('%s container entry is not an object', $class));
            }
        } else {
            if (!class_exists($class)) {
                if ($method) {
                    $class .= '::' . $method . '()';
                }
                throw new RuntimeException(sprintf('Callable %s does not exist', $class));
            }
            $instance = new $class($this->container);
        }
        return [$instance, $method];
    }

    /**
     * @param mixed $resolved
     * @param mixed $toResolve
     *
     * @throws RuntimeException
     */
    private function assertCallable($resolved, $toResolve): callable
    {
        if (!is_callable($resolved)) {
            if (is_callable($toResolve) || is_object($toResolve) || is_array($toResolve)) {
                $formatedToResolve = ($toResolveJson = json_encode($toResolve)) !== false ? $toResolveJson : '';
            } else {

View on GitHub (pinned to 80900fb39c)

When it happens

Trigger: Thrown at Slim/CallableResolver.php:144 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of slimphp/Slim@80900fb39c (2026-08-21). Data as JSON: /api/errors/d7b1a5ef8e68ba4c. Report an issue: GitHub.