Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Returns a parent directory's path
<?php dirname(string $path, int $levels = 1): string
<?php     public function writeProcessId(int $masterProcessId): void

    {

        if (! is_writable($this->path) && ! is_writable(dirname($this->path))) {

            throw new RuntimeException('Unable to write to process ID file.');

        }
<?php     public function writeState(array $newState): void

    {

        if (! is_writable($this->path) && ! is_writable(dirname($this->path))) {

            throw new RuntimeException('Unable to write to process ID file.');

        }
<?php     public function writeProcessIds(int $masterProcessId, int $managerProcessId): void

    {

        if (! is_writable($this->path) && ! is_writable(dirname($this->path))) {

            throw new RuntimeException('Unable to write to process ID file.');

        }
<?php     public function writeState(array $newState): void

    {

        if (! is_writable($this->path) && ! is_writable(dirname($this->path))) {

            throw new RuntimeException('Unable to write to process ID file.');

        }