- $result = preg_replace($this->pre_search, $this->pre_replace, $matches[1]);
- $text = preg_replace('/<pre[^>]*>.*<\/pre>/ismU', '<div><br>' . $result . '<br></div>', $text, 1);
+ // convert the content
+ $this->pre_content = sprintf('<div><br>%s<br></div>',
+ preg_replace($this->pre_search, $this->pre_replace, $matches[1]));
+ // replace the content (use callback because content can contain $0 variable)
+ $text = preg_replace_callback('/<pre[^>]*>.*<\/pre>/ismU',
+ array('html2text', '_preg_pre_callback'), $text, 1);
+ // free memory
+ $this->pre_content = '';