4.3.8 Validate类
Validate()：验证数组中的值
Check()：正则表达式运算
setValidate()：需要验证的内容
getError()：得到验证的错误信息
Validate类使用示例：
//创建验证类
$obj_validate = new Validate();
$obj_validate->validateparam = array(
array("input"=>$_POST["username"],"require"=>"true","message"=>'用户名不能为空'),
array("input"=>$_POST["password"],"require"=>"true","message"=>'密码不能为空'),
array("input"=>$_POST["email"], "require"=>"true","validator"=>"email","message"=>'请正确填入Email'),
);
$error = $obj_validate->validate();
if ($error != ''){
//输出错误信息
showDialog($error);
}
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