1085a1086,1101
>   //The following tags may contain text with a URL that should be converted to a link
>   //List also contains standalone/empty tags like img and br
>   $tags_begin =  'caption|td|th|div|dd|dt|li|blockquote|address|p|h[1-6]|i|b|u|tt|big|small|strike|s|em|strong|font|dfn|samp|kbd|var|cite|abbr|acronym|sub|sup|q|ins|del|img|br|object|applet';
> 
> 
>   //transform each tagname from 'p' to '<\/?p[^>]*>'
>   //this pattern will match <p>, </p>, <p class="foo"> and <p />
>   //the last one is significant for xhtml standalone tags like <img /> and <br />
>   //note: <img/> and <br/>, won't work. While valid xhtml their use is discouraged anyway
>   //note: the pattern will obviously match many invalid tags too like <p &&&>    
>   $arr_tags_begin = explode( "|", $tags_begin );
>   for ( $i = 0; $i < count( $arr_tags_begin ); $i++ ){
>     $arr_tags_begin[$i] = '<\/?' . $arr_tags_begin[$i] . '[^>]*>'; 
>   }
>   $tags_begin = implode( "|", $arr_tags_begin );
> 
1091,1093c1107,1124
<   // Match absolute URLs.
<   $text = preg_replace_callback("`(<p>|<li>|<br\s*/?>|[ \n\r\t\(])((http://|https://|ftp://|mailto:|smb://|afp://|file://|gopher://|news://|ssl://|sslv2://|sslv3://|tls://|tcp://|udp://)([a-zA-Z0-9@:%_+*~#?&=.,/;-]*[a-zA-Z0-9@:%_+*~#&=/;-]))([.,?!]*?)(?=(</p>|</li>|<br\s*/?>|[ \n\r\t\)]))`i", '_filter_url_parse_full_links', $text);
< 
---
>   //The structure of each three matches below is
>   // 1. a tag from the list above or newline or </a>
>   // 2. any characters except "<" 
>   // 3. the url to match
>   // 4. possible period or other marks at end of url are considered separate (end of sentence)
>   // 5. end url in space, newline or tag ("<" character)
> 
>   //In many cases the patterns below only match the first url if there are many in the same paragraph. 
>   //Therefore the preg_replace are encapsulate in loops that will re-run the replace as many times as needed.
> 
>   // Match absolute URLs. 
>   $protocols = 'http://|https://|ftp://|mailto:|smb://|afp://|file://|gopher://|news://|ssl://|sslv2://|sslv3://|tls://|tcp://|udp://';
>   $urlpattern = "($protocols)([a-zA-Z0-9@:%_+*~#?&=.,/;-]*[a-zA-Z0-9@:%_+*~#&=/;-])";
>   $re = "`(($tags_begin|\n|\r|</a>)([^<])*?)($urlpattern)(([\.\,\?\!]*?)[\<\s\n\r])`i";
>   while(preg_match($re, $text)) {
>     $text = preg_replace_callback($re, '_filter_url_parse_full_links', $text);
>   }
>   
1095,1096c1126,1131
<   $text = preg_replace("`(<p>|<li>|<br\s*/?>|[ \n\r\t\(])([A-Za-z0-9._-]+@[A-Za-z0-9._+-]+\.[A-Za-z]{2,4})([.,?!]*?)(?=(</p>|</li>|<br\s*/?>|[ \n\r\t\)]))`i", '\1<a href="mailto:\2">\2</a>\3', $text);
< 
---
>   $urlpattern = '[A-Za-z0-9._-]+@[A-Za-z0-9._+-]+\.[A-Za-z]{2,4}';
>   $re = "`(($tags_begin|\n|\r|</a>)([^<])*?)($urlpattern)(([\.\,\?\!]*?)[\<\s\n\r])`i";
>   while(preg_match($re, $text)) {
>     $text = preg_replace($re, '\1<a href="mailto:\4">\4</a>\5', $text);
>   }
>   
1098c1133,1138
<   $text = preg_replace_callback("`(<p>|<li>|[ \n\r\t\(])(www\.[a-zA-Z0-9@:%_+*~#?&=.,/;-]*[a-zA-Z0-9@:%_+~#\&=/;-])([.,?!]*?)(?=(</p>|</li>|<br\s*/?>|[ \n\r\t\)]))`i", '_filter_url_parse_partial_links', $text);
---
>   $urlpattern = 'www\.[a-zA-Z0-9@:%_+*~#?&=.,/;-]*[a-zA-Z0-9@:%_+~#\&=/;-]';
>   $re = "`(($tags_begin|\n|\r|</a>)([^<])*?)($urlpattern)(([\.\,\?\!]*?)[\<\s\n\r])`i";
>   while(preg_match($re, $text)) {
>     $text = preg_replace_callback($re, '_filter_url_parse_partial_links', $text);
>   }
>   
1100d1139
< 
1182,1185c1221,1226
<   $match[2] = decode_entities($match[2]);
<   $caption = check_plain(_filter_url_trim($match[2]));
<   $match[2] = check_url($match[2]);
<   return $match[1] . '<a href="'. $match[2] .'" title="'. $match[2] .'">'. $caption .'</a>'. $match[5];
---
>   //which parenthesis in the regexp contains the url?
>   $i = 4;
>   $match[$i] = decode_entities($match[$i]);
>   $caption = check_plain(_filter_url_trim($match[$i]));
>   $match[$i] = check_url($match[$i]);
>   return $match[1] . '<a href="'. $match[$i] .'" title="'. $match[$i] .'">'. $caption .'</a>'. $match[$i+3];
1192,1195c1233,1238
<   $match[2] = decode_entities($match[2]);
<   $caption = check_plain(_filter_url_trim($match[2]));
<   $match[2] = check_plain($match[2]);
<   return $match[1] . '<a href="http://'. $match[2] .'" title="'. $match[2] .'">'. $caption .'</a>'. $match[3];
---
>   //which parenthesis in the regexp contains the url?
>   $i = 4;
>   $match[$i] = decode_entities($match[$i]);
>   $caption = check_plain(_filter_url_trim($match[$i]));
>   $match[$i] = check_plain($match[$i]);
>   return $match[1] . '<a href="http://'. $match[$i] .'" title="'. $match[$i] .'">'. $caption .'</a>'. $match[$i+1];
1196a1240
>