preg_replace 不在 Wordpress 插件中替换

问题描述

跟进我之前的问题，我想用以下格式的链接替换 ​​ALL-CAPS 单词的每个实例:

In follow-up to my previous question, I want to replace every instance of an ALL-CAPS word with a link of the following format:

dictionary.com/browse/<TERM>

我使用的 preg_replace 调用是这样的:

The preg_replace call I am using is this:

$content = preg_replace('#[A-Z][A-Z]+#', '<a href="//dictionary.com/browse/$1">$1</a>', $content);

使用 http://gskinner.com/RegExr，看来我的正则表达式是正确的，而且它应该在每次查找时进行替换.

Using http://gskinner.com/RegExr, it appears I have my regex correct, and that it should be replacing on each find.

我是不是在 preg_replace 调用中做错了什么，或者是在将插件/过滤器注册到 Wordpress API 时做错了什么?

Have I done something wrong, either in the preg_replace call, or pehaps in the registration of the plugin/filter to the Wordpress API?

调用的完整上下文:

function define_filter($content){
  $content = preg_replace('#[A-Z][A-Z]+#', '<a href="//dictionary.com/browse/$1">$1</a>', $content);
}

add_filter('the_content', 'define_filter');

推荐答案

我认为函数需要返回替换的结果:

I believe the function needs to return the result of the replacement:

return $content;

此外，该正则表达式看起来不正确.如果你想匹配所有大写的整个单词，它是

Also, that regex doesn't look right. If you want to match a whole word in all caps, it's

'#\b[A-Z]+\b#'

此外，您需要 $0(整个匹配项)，而不是 $1(第一个捕获组，您的正则表达式没有)

Also, you want $0 (the whole match), not $1 (the first capture group, which your regex doesn't have)

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