*/ public static function create() { if (self::isSupported()) { /** @var \PhpOption\Option */ return Some::create(new self()); } return None::create(); } /** * Determines if the adapter is supported. * * This happens if PHP is running as an Apache module. * * @return bool */ private static function isSupported() { return \function_exists('apache_getenv') && \function_exists('apache_setenv'); } /** * Read an environment variable, if it exists. * * @param string $name * * @return \PhpOption\Option */ public function read(string $name) { /** @var \PhpOption\Option */ return Option::fromValue(apache_getenv($name))->filter(static function ($value) { return \is_string($value) && $value !== ''; }); } /** * Write to an environment variable, if possible. * * @param string $name * @param string $value * * @return bool */ public function write(string $name, string $value) { return apache_setenv($name, $value); } /** * Delete an environment variable, if possible. * * @param string $name * * @return bool */ public function delete(string $name) { return apache_setenv($name, ''); } }