<?php
class FormValidator {

    private array $fieldValidation;

    public function __construct(array $fieldValidation) {
        $this->fieldValidation = $fieldValidation;
    }

    public function isValid(array $req) {
        foreach($fieldValidation as $field => $params) {
            if($params['required'] && !isset($req[$field])) {
                return false;
            }

            if(isset($params['regex']) && !preg_match($params['regex'], $req[$field])) {
                return false;
            }
        }

        return true;
    }

}
?>