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<?php
declare(strict_types=1);
namespace Enjoys\Dotenv\Parser\Env;
use Enjoys\Dotenv\Exception\InvalidArgumentException;
final class Key implements \Stringable
{
private string $value;
public function __construct(string $value)
if (!\preg_match('/^([A-Z_])([A-Z_0-9]+)?$/', $value)) {
throw new InvalidArgumentException(
'The key %s have invalid chars.
The key must be UPPERCASE and have only letters (A-Z) digits (0-9) and _.
And starts with A-Z or _'
);
}
$this->value = $value;
public function __toString(): string
return $this->value;
public function getValue(): string
Enjoyzz /
dotenv
