匹配给定字符串内的 WordPress 短代码

发布于 2024-12-17 07:16:16 字数 220 浏览 4 评论 0原文

我想匹配字符串内的短代码，并从这里找到了以下正则表达式。效果很好。但我想了解它是如何工作的。

谁能解释一下这个正则表达式的组成部分以及它如何匹配短代码。

preg_match_all('%(?<=\[shortcode\]).*?(?=\[/shortcode\])%s',$content, $result, PREG_PATTERN_ORDER);

原文

I wanted to match shortcodes inside a string and found the following regex from here. It works fine. But i want to learn how it works.

Can anyone plz explain me the components of this regex and how it matches the shortcode.

preg_match_all('%(?<=\[shortcode\]).*?(?=\[/shortcode\])%s',$content, $result, PREG_PATTERN_ORDER);

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胡大本事 2024-12-24 07:16:16

有解释正则表达式的工具。

例如，您的：

NODE                     EXPLANATION
----------------------------------------------------------------------
  (?<=                     look behind to see if there is:
----------------------------------------------------------------------
    \[                       '['
----------------------------------------------------------------------
    shortcode                'shortcode'
----------------------------------------------------------------------
    \]                       ']'
----------------------------------------------------------------------
  )                        end of look-behind
----------------------------------------------------------------------
  .*?                      any character  (0 or more times
                           (matching the least amount possible)
----------------------------------------------------------------------
  (?=                      look ahead to see if there is:
----------------------------------------------------------------------
    \[                       '['
----------------------------------------------------------------------
    /shortcode               '/shortcode'
----------------------------------------------------------------------
    \]                       ']'
----------------------------------------------------------------------
  )                        end of look-ahead
----------------------------------------------------------------------

阅读有关 http://www.regular-expressions.info/ 上的断言的更多信息Lookaround.html

There are tools to explain regular expressions.

Yours for example:

NODE                     EXPLANATION
----------------------------------------------------------------------
  (?<=                     look behind to see if there is:
----------------------------------------------------------------------
    \[                       '['
----------------------------------------------------------------------
    shortcode                'shortcode'
----------------------------------------------------------------------
    \]                       ']'
----------------------------------------------------------------------
  )                        end of look-behind
----------------------------------------------------------------------
  .*?                      any character  (0 or more times
                           (matching the least amount possible)
----------------------------------------------------------------------
  (?=                      look ahead to see if there is:
----------------------------------------------------------------------
    \[                       '['
----------------------------------------------------------------------
    /shortcode               '/shortcode'
----------------------------------------------------------------------
    \]                       ']'
----------------------------------------------------------------------
  )                        end of look-ahead
----------------------------------------------------------------------

Read more about the assertions on http://www.regular-expressions.info/lookaround.html

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