Code Igniter auto_link（）弄乱了我的电子邮件地址

Question

Using auto_link() to output the copy from a CMS controlled page onto the front end. I have 2 email addresses, recruit@ and bankrecruit@ in the stored copy.

When I look at the front end the first email, recruit@, is auto_linked to become a linked email address but the second one becomes bank followed by the recruit@ email link. This is obviously not what I expected.

auto_link() is matching all cases of recruit@ in which case the bankrecruit@ is being converted as it finds recruit@ first and converts that.

If I remove the recruit@ then bankrecruit@ works fine. Also if I change the name to bank@ then both addresses work as expected.

Is there a resolution for this?

<p>This is the address [e-mail]</p>
<p>This is the second address [e-mail]</p>

And the script is:

auto_link($content)

Answer 1

As @cryptic pointed, it is a bug in the auto_link method. (See source) They are finding all email address in the output and then, they do a replace all (str_replace) with the anchored version. So...

<p>This is the address [e-mail]</p>
<p>This is the second address [e-mail]</p>

becomes

<p>This is the address <a ...>[e-mail]</a></p>
<p>This is the second address b<a ...>[e-mail]</a></p>

on first pass for the email [e-mail]. On the second e-mail, they try to replace [e-mail] with the anchored version, but the str_replace can not find the address, it has already been replaced.

You could implement your own fix by :

1. Extending the auto_link method of the URL helper. See documentation
2. Copy the auto_link method from the CodeIgniter source into that new Helper.
3. Replace only the first occurrence of the string. See this SO thread.

For example:

$str = str_replace($matches['0'][$i], safe_mailto($matches['1'][$i].'@'.$matches['2'][$i].'.'.$matches['3'][$i]).$period, $str);

becomes

$str = preg_replace('/' . $matches['0'][$i] . '/', safe_mailto($matches['1'][$i].'@'.$matches['2'][$i].'.'.$matches['3'][$i]).$period, $str, 1);

That should fix it for you. I would advise against modifying the system's URL_Helper, you might run into some migration problems later on.

Hope this helps.