TP5 正则验证数据

<?php
namespace app\index\validate;

use think\Validate;

class User extends Validate
{
    protected $rule = [
        ['account','require|/^[a-zA-Z]\w{6,20}$/','用户名不能为空|用户名格式不正确'],
        ['password','require|/^[a-zA-Z]\w{8,}$/','密码不能为空|密码格式不正确'],
    ];


    protected $scene = [
        'add'   =>  ['name','email'],
        'edit'  =>  ['email'],
    ];
}