Codeigniter的正则表达式匹配

Codeigniter的正则表达式匹配

本文介绍了Codeigniter的正则表达式匹配的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有这个正则表达式在javascript中验证:

  / ^(?:'[Az] \\._\  - ] [A-z0-9])| [A-z0-9])* [a-z0-9 _] *')$ / 
pre>

现在我想要使用Codeigniter的表单验证的表单验证的同一个正则表达式:

  $ this-> form_validation-> set_rules('username','Nombre de usuario','required | min_length [2] | max_length [15] | regex_match [/ ^ _。\  - ] + $ /] | is_unique [user.username]'); 

该行中的正则表达式不等同于我提到的正则表达式。



尝试复制和粘贴同一个正则表达式时,它不工作。我知道这是蠢,我似乎不能完全理解正则表达式。

解决方案

虽然没有 method in CodeIgniter ,它未列在CI中用户指南。



根据的评论:

CodeIgniter 作为validate方法之间的分隔符。



因此,为了防止破坏正则表达式,您可以创建一个,通过匹配regex验证输入:

  public函数regex_check($ str)
{
if(1!== preg_match(/ ^(?:'[A-Za-z](([\._\-] [A -Za-z0-9])| [A-Za-z0-9])* [a-z0-9 _] *')$ /,$ str))
{
$ this- > form_validation-> set_message('regex_check','%s字段无效!');
return FALSE;
}
else
{
return TRUE;
}
}

然后添加验证规则,如下所示: p>

  $ this-> form_validation-> set_rules('username','Nombre de usuario', 'required | min_length [2] | max_length [15] | callback_regex_check | is_unique [user.username]'); 


I have this regular expression for validation in javascript:

/^(?:'[A-z](([\._\-][A-z0-9])|[A-z0-9])*[a-z0-9_]*')$/

Now I want the same regular expression for the form validation using Codeigniter's form validation:

$this->form_validation->set_rules('username', 'Nombre de usuario', 'required|min_length[2]|max_length[15]|regex_match[/^[A-Z a-z 0-9 _ . \-]+$/]|is_unique[user.username]');

the regex in that line is not equivalent to the one I mentioned.

When trying to copy and paste same regex, It doesn't work. I know this is dumb i just can't seem to fully understand regular expressions.

解决方案

Though there is regex_match() method in CodeIgniter validation library, It's not listed in the CI User Guide.

Per @Limon's comment:

CodeIgniter uses | as a separator between validate methods.

Therefore, to prevent from breaking the regex, you could create a callback method in your Controller to validate the input by matching the regex:

public function regex_check($str)
{
    if (1 !== preg_match("/^(?:'[A-Za-z](([\._\-][A-Za-z0-9])|[A-Za-z0-9])*[a-z0-9_]*')$/", $str))
    {
        $this->form_validation->set_message('regex_check', 'The %s field is not valid!');
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}

Then add the validation rule, as follows:

$this->form_validation->set_rules('username', 'Nombre de usuario', 'required|min_length[2]|max_length[15]|callback_regex_check|is_unique[user.username]');

这篇关于Codeigniter的正则表达式匹配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!

08-21 07:05