rule-json)
[Lowercase](#rule-lowercase)
[MAC Address](#rule-mac)
[Max](#rule-max)
[Min](#rule-min)
[NotIn](#rule-not-in)
[Regular Expression](#rule-regex)
[Not Regular Expression](#rule-not-regex)
[Same]<a name="rule-not-in"></a>
#### not_in:_foo_,_bar_,...
验证字段必须不在给定值列表中。required',
Rule::notIn(['sprinkles', 'cherries']),
],
])->validate();
```
<a name="rule-not-regexoptional(v::alpha())->validate(''); // true
v::optional(v::alpha())->validate(null); // true
// 否定规则
v::not