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<?php
declare(strict_types=1);
namespace Dotenv\Repository\Adapter;
use PhpOption\Option;
use PhpOption\Some;
final class ServerConstAdapter implements AdapterInterface
{
/**
* Create a new server const adapter instance.
*
* @return void
*/
private function __construct()
{
//
}
/**
* Create a new instance of the adapter, if it is available.
*
* @return \PhpOption\Option<\Dotenv\Repository\Adapter\AdapterInterface>
*/
public static function create()
{
/** @var \PhpOption\Option<AdapterInterface> */
return Some::create(new self());
}
/**
* Read an environment variable, if it exists.
*
* @param non-empty-string $name
*
* @return \PhpOption\Option<string>
*/
public function read(string $name)
{
/** @var \PhpOption\Option<string> */
return Option::fromArraysValue($_SERVER, $name)
->filter(static function ($value) {
return \is_scalar($value);
})
->map(static function ($value) {
if ($value === false) {
return 'false';
}
if ($value === true) {
return 'true';
}
/** @psalm-suppress PossiblyInvalidCast */
return (string) $value;
});
}
/**
* Write to an environment variable, if possible.
*
* @param non-empty-string $name
* @param string $value
*
* @return bool
*/
public function write(string $name, string $value)
{
$_SERVER[$name] = $value;
return true;
}
/**
* Delete an environment variable, if possible.
*
* @param non-empty-string $name
*
* @return bool
*/
public function delete(string $name)
{
unset($_SERVER[$name]);
return true;
}
}