PHPBB的BBCode到HTML（正则表达式或其他方式）(phpbb BBCode to HTML

我在迁移的内容从phpBB的使用WordPress的过程。我已经suceeded达到翻译的bbcode到HTML的地步。

BB代码的由被注入每个标签的字母数字字符串复杂。

一个常见的职位将包含类似这样的文字...

[url=url] Click here [/url:583ow9wo]

[b:583ow9wo] BOLD [/b:583ow9wo]

[img:583ow9wo] jpg [/img:583ow9wo]

我初出茅庐使用正则表达式，但认为这可能是一条出路，因为我发现从以下后一些帮助https://stackoverflow.com/a/5505874/4356865 （使用正则表达式[/ B：\ d {5} ]），但在这种情况下，正则表达式将只从这个例子中删除数字字符。

任何帮助表示赞赏。

像这样的东西会为没有属性标签的工作：

\[(b|i|u)(:[a-z0-9]+)?\](.*?)\[\/\1(?:\2)?\]

\[               -- matches literal "[" 
  (b|i|u)        -- matches b, i, or u, captures as backreference 1
  (:[a-z0-9]+)?  -- matches colon and then alphanumeric string, captures as backreference 2
                 -- the question mark allows the :string not to be present.
\]               -- matches literal "]"
(.*?)            -- matches anything*, as few times as required to finish the match, creates backreference 3.
\[               -- matches literal "["
  \/             -- matches literal "/"
  \1             -- invokes backreference 1 to make sure the opening/closing tags match
  (?:\2)?        -- invokes backreference 2 to further make sure it's the same tag
\]               -- matches literal "]"

匹配像URL标签是很容易

与具有属性的标签，他们做不同的事情与他们的属性，所以它可能更容易从像IMG标签seperately处理像URL的标签。

\[(url)(?:\s*=\s*(.*?))?(:[a-z0-9]+)\](.*?)\[\/\1(?:\3)?\]

\[                    -- matches literal "["
  (url)               -- matches literal "url", in parentheses so we can invoke backreference 1 later, easier for you to modify
  (?:                 -- ?: signifies a non-capturing group, so it creates a group without creating a backreference, or altering the backreference count.
    \s*=\s*           -- matches literal "=", padded by any amount of whitespace on either side
    (.*?)             -- matches any character, as few times as possible, to complete the match, creates backreference 2
  )                   -- closes the noncapturing group
  (:[a-z0-9]+)        -- matches the alphanumeric string as backreference 3.
\]                    -- matches literal "]"
(.*?)                 -- matches any character as few times as possible to complete the match, backreference 4
\[                    -- matches literal "["
  \/                  -- matches literal "/"
  \1                  -- invokes backreference 1
  (?:\3)?             -- invokes backreference 3
\]                    -- matches literal "["

为了您的更换，标签的内容是反向引用自己，使你能为B / I / U标签做这样的事情。