使用PHP修改超链接

Question

I'm using a regular expression to turn URLs in blog comments into clickable hyperlinks. However, i also want to do the opposite:

Since i allow certain html tags (but not <a>), if somebody types in a hyperlink, i'd like to change it from:

<a href="http://www.example.com">My Link</a>

into

My Link: http://www.example.com

where the generated code is:

<p><b>My Link:</b> <a href="http://www.example.com" rel="nofollow">http://www.example.com</a></p>

Thanks!

Answer 1

Try with this.

function find_links($url){
    $pattern = '/<a (.*?)href="(.*?)\/\/(.*?)"(.*?)>(.*?)<\/a>/i';
    $url = preg_replace_callback($pattern, 'process_links',$url);
    return $url;
}

function process_links($m){
    return "{$m[5]} <a href=\"{$m[2]}//{$m[3]}\" rel=\"nofollow\">{$m[2]}//{$m[3]}</a>";
}

$links = find_links('<a href="http://www.example.com">My Link</a>');

EDIT: Oops! I didn't quite gave answer to the OP's question.