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<?php
declare(strict_types=1);
/**
* @license http://opensource.org/licenses/mit-license.php MIT
* @link https://github.com/nicoSWD
* @author Nicolas Oelgart <[email protected]>
*/
namespace nicoSWD\Rules;
use Exception;
use nicoSWD\Rules\Grammar\JavaScript;
class Rule
{
/** @var string */
private $rule;
/** @var Parser */
private $parser;
/** @var Evaluator */
private $evaluator;
private $parsedRule = '';
private $error = '';
public function __construct(string $rule, array $variables = [])
$this->rule = $rule;
$this->parser = new Parser(new Tokenizer(new JavaScript()), new Expressions\Factory());
$this->evaluator = new Evaluator();
$this->parser->assignVariables($variables);
}
public function isTrue(): bool
return $this->evaluator->evaluate(
$this->parsedRule ?:
$this->parser->parse($this->rule)
);
public function isFalse(): bool
return !$this->isTrue();
* Tells whether a rule is valid (as in "can be parsed without error") or not.
public function isValid(): bool
try {
$this->parsedRule = $this->parser->parse($this->rule);
} catch (Exception $e) {
$this->error = $e->getMessage();
return false;
return true;
public function getError(): string
return $this->error;
public function registerToken(string $class, string $regex, int $priority = 10)
$this->parser->registerToken($class, $regex, $priority);
nicoSWD /
php-rule-parser
