RegEx处理和更改字符串中的多个链接

Question

I am having a hard time figuring this out:

I have a string ($data) which contains some links formatted this way:

[pagelink]Folder/File[/pagelink]

The $data contains multiple of these links.

I need to replace these links with actual html links and I have this code to do it (which works):

$data = preg_replace('/\[pagelink\](.*?)\[\/pagelink\]/is','<a href="$1">$1</a>',$data);

Now I would like to remove all the "Folder" instances from the part of the link that is showed to the user without actually altering the link itself; in other words if the link is this:

[pagelink]Folder/File[/pagelink]

I would like it to become this:

<a href="Folder/File">File</a>

What I tried is this:

$data = preg_replace('/\[pagelink\](.*?)\[\/pagelink\]/is','<a href="$1">'.( strstr($1) === false ? $1 : str_replace('/','',strstr($1)) ).'</a>',$data);

but I get a bunch of errors so I guess I can't use back references this way.

Could you guys help me out please? Thanks

Answer 1

Revise your regular expression so the folder and file are in separate capture groups.

$data = preg_replace('#\[pagelink\](.*?/)?([^/]*?)\[/pagelink\]#is','<a href="$1$2">$2</a>',$data);

Capture group 1 gets Folder/, capture group 2 gets File.