Wordpress返回preg_replace - 内容消失了

Question

i have put this function in the functions.php theme file:

function filter_ptags_on_images($content){
   return preg_replace('​/<p>\s*(<a .*>)?\s*(<img .* \/>)\s*(<\/a>)?\s*<\/p>/iU', '\1\2\3', $content);
}

add_filter('the_content', 'filter_ptags_on_images');

After that the whole pages content are gone, i have deleted that function from functions.php but the content still not showing, any ideas why?

Answer 1

Try with this: <p>\s*(<a[^>]*>)?(<img[^>]+>)(<\/a>)?\s*<\/p>

It will also work with images within <a> tags.

Demo

Explained:

<p>               # p tag
  \s*             # 0 or more spaces
  (<a[^>]*>)?     # optional <a> tag:   (first capturing group)
                  #  it matches <a and then any non '>' character
                  #  repeated 0 or more times and then a '>'
                  #  (second capturing group)
  (<img[^>]+>)    # image tag
  (<\/a>)?        # optional closing </a> (third capturing group)
  \s*
<\/p>