<?php

class check_rule_class {

}

class rule{

    public static function check($rule, $obj) {
        $res = false;
        if (preg_match("/^\(([a-zA-Z0-9_]+)\s*(((\=|\>|\<|\>=|\<=)\s*\'?[a-zA-Z0-9\-\s\:]+\'?)|(in\s*\[(\'?[a-zA-Z0-9\-]+\'?\s*\,?\s*)+\]))\)$/", $rule, $matches)) {
            $attribute = $matches[1];
            if (strpos($rule, 'in') !== false) {
                $rArr = explode('in', $rule);
                $paramStr = str_replace(array('[', ']', ')', ' ', '\'', '\''), '', $rArr[1]);
                $paramArr = explode(',',$paramStr);
                $res = in_array($obj->$attribute, $paramArr);
            } else {
                $r = $rule;
                if (preg_match('/[a-zA-Z0-9_]+\s*=/', $rule, $params)) $r = str_replace('=', '==', $rule);
                $atibute = $obj->$attribute;
                $res = eval('return ($atibute'.str_replace($attribute, '', substr($r, 1)).";");
            }
        }
        return $res;
    }

    public static function check_rule($ruleStr, $ruleClass) {
        $GLOBALS['log']->fatal('start-check-rule-------'.$ruleStr);
        if (preg_match_all("/\([a-zA-Z0-9_]+\s*(((=|\>|\<|\>=|\<=)\s*\'?[a-zA-Z0-9\-\s\:]+\'?)|(in\s*\[(\'?[a-zA-Z0-9\-]+\'?\s*\,?\s*)+\]))\)/", $ruleStr, $rules)) {
            foreach ($rules[0] as $rule) {
                $ruleRes = self::check($rule, $ruleClass);
                $ruleStr = str_replace($rule, (int)$ruleRes, $ruleStr);
            }
            $GLOBALS['log']->fatal('the-end-rule-----'.$ruleStr);
            if (!preg_match('/[^(0|1|and|or|!|\(|\)|\s)]/', $ruleStr)) {
                return eval('return '.str_replace(array('and', 'or'), array(' and ', ' or '), $ruleStr).";");
            }
        }
        return false;
    }
}

/**
 * 调用示例
 $class = new check_rule_class();
$class->a = '2';
$class->b = 5;
$res = rule::check_rule("!(a=2) or (b in [2, '5'])", $class);
var_dump($res); */

利用了php的魔术方法