class Runtime

class Runtime {
    
    /**
     * @param class-string $class
     */
    public function hasConstant(string $constant, ?string $class = null) : bool {
        return defined(ltrim($class . '::' . $constant, ':'));
    }
    
    /**
     * @param class-string $class
     *
     * @return mixed
     */
    public function getConstant(string $constant, ?string $class = null) {
        return constant(ltrim($class . '::' . $constant, ':'));
    }
    public function hasFunction(string $fn) : bool {
        return function_exists($fn);
    }
    
    /**
     * @param mixed[] $arguments
     *
     * @return mixed
     */
    public function invoke(callable $callable, array $arguments = []) {
        return $callable(...$arguments);
    }
    
    /**
     * @param class-string $class
     */
    public function hasClass(string $class) : bool {
        return class_exists($class, false);
    }
    
    /**
     * @template T of object
     * @param mixed[] $arguments
     *
     * @phpstan-param class-string<T> $class
     * @phpstan-return T
     *
     * @throws \ReflectionException
     */
    public function construct(string $class, array $arguments = []) : object {
        if (empty($arguments)) {
            return new $class();
        }
        $refl = new \ReflectionClass($class);
        return $refl->newInstanceArgs($arguments);
    }
    
    /** @return string[] */
    public function getExtensions() : array {
        return get_loaded_extensions();
    }
    public function getExtensionVersion(string $extension) : string {
        $version = phpversion($extension);
        if ($version === false) {
            $version = '0';
        }
        return $version;
    }
    
    /**
     * @throws \ReflectionException
     */
    public function getExtensionInfo(string $extension) : string {
        $reflector = new \ReflectionExtension($extension);
        ob_start();
        $reflector->info();
        return ob_get_clean();
    }

}