使用Codeigniter表单验证库，如何确保至少输入一个字母? [英] Using the Codeigniter form validation library, how can I ensure at least one letter is entered?

问题描述

我正在使用Codeigniter表单验证.在我的注册表格中， Username 字段仅允许使用 123456 之类的数字.我不希望这种情况发生.

I am using Codeigniter form validation. In my registration form the Username field allows only numbers like 123456. I don't want this to happen.

我的验证规则如下

'rules'=>'trim|required|alpha_numeric|min_length[6]|xss_clean'

我想防止用户仅输入数字字符串.字母数字字符串很好，字母字符串很好，但是纯数字字符串却不好.

I want to prevent users entering just numeric strings. Alpha numeric strings are fine, alpha strings are fine, but purely numeric ones are not.

推荐答案

仅允许字母

在规则中添加 alpha ，并从规则中删除 alpha_numeric

Add alpha to your rules and remove alpha_numeric from your rules

您可以使用此页面作为内置验证的参考点规则.

You can use this page as a point of reference for built in validation rules.

自从您澄清之后.

要实现此目的，没有内置的验证规则.您将需要通过创建 libraries/MY_Form_validation.php 文件来扩展 Form_validation 库.有关如何扩展库的信息，请参见本手册页面.

To achieve this, there's no built in validation rule. You will need to extend the Form_validation library by creating a libraries/MY_Form_validation.php file. See this manual page on how to extend libraries.

在此文件中，创建以下功能

In this file, create the following function

function at_least_one_letter($string) {
    return preg_match('#[a-zA-Z]#', $string);
}

然后，您可以将验证规则 at_least_one_letter 添加到您的规则中.

Then you can add the validation rule at_least_one_letter to your rules.

这篇关于使用Codeigniter表单验证库，如何确保至少输入一个字母?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！