自定义范围，自定义运算符，自定义运算次数_PHP教程

optTimes + 1; $index++) {
            $elements[] = $this->randomValue();
        }
        $operatorType = strlen($this->operators); //有几个运算符供选择
        //开始组装算式
        $question = '';
        for ($index = 0; $index operators, mt_rand(0, $operatorType - 1), 1);
        }

        eval('$anwser = ' . $question . ';');
        if ($anwser scope[0], $this->scope[1]);
    }

}

测试

generate();
?>

结果：26 + 85 = 111

http://www.bkjia.com/PHPjc/440112.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/440112.htmlTechArticle?php/** * * 出题引擎一枚 * * @author Tourmaline * @copyright (c) 2013, Unary Inc. */class QuestionEngine { /** * 出题范围 * @var string $scope */ public $scope = array(1,...