HTML to BB code

dud3r

How do I convert HTML code to BB Code, primarily the [img] tag and the [url] tag. Here's the code I tried which doesn't seem to work (both [img] and [url] codes are below).

// [IMG] Code
$new_post = eregi_replace("\\[img]([^\\[]*)\\[/img\\]","<img src=\"\\1\" border=\"0\">",$new_post);

// [URL] Code

Err, I just realized that I don't even have the [url] code anymore. :o
Anyway, thanks for your advice, etc.

planetsim

Why not search, this topic has come up many times with many variations on how to do it. I also highly suggest avoiding the use of eregi_replace its far too slow.

dud3r

Except I did and didn't find anything useful in the search.

bpat1434

download phpBB, open up their include files, see how they do it.

<?php
// Taken from templates/subSilver/bbcode.tpl
$bbcode_tpl['img'] = '<!-- BEGIN img --><img src="{URL}" border="0" /><!-- END img -->';

// Adapted from bbcode.php in phpBB2
$bbcode_tpl['img'] = str_replace('{URL}', '\\1', $bbcode_tpl['img']);

// .... //
$patterns[] = "#\[img:$uid\]([^?].*?)\[/img:$uid\]#i";
$replacements[] = $bbcode_tpl['img'];

// ... //
$text = preg_replace($patterns, $replacements, $text);
?>

dud3r

It's this part

// matches a [url]xxxx://www.phpbb.com[/url] code..
	$patterns[] = "#\[url\]([\w]+?://([\w\#$%&~/.\-;:=,?@\]+]|\[(?!url=))*?)\[/url\]#is";
	$replacements[] = $bbcode_tpl['url1'];

I use a different code. How do I include [\w]+?:// into this:

$string = preg_replace('/(\[url\])(.*?)(\[\/url\])/',"<a href=\"\\2\" target=_blank>\\2</a>",$string);

Because urls with just www.url.com will convert to http://www.sitename.come/www.url.com where sitename.com is the site where the php file is hosted, but urls with http:// before the actual url will convert fine.

bpat1434

\w is a PERL operator that is equivalent to:
[a-zA-Z0-9_ ]

If you look into phpBBs bbcode, there are 4 URL patterns:

	$bbcode_tpl['url1'] = str_replace('{URL}', '\\1', $bbcode_tpl['url']);
	$bbcode_tpl['url1'] = str_replace('{DESCRIPTION}', '\\1', $bbcode_tpl['url1']);

$bbcode_tpl['url2'] = str_replace('{URL}', 'http://\\1', $bbcode_tpl['url']);
$bbcode_tpl['url2'] = str_replace('{DESCRIPTION}', '\\1', $bbcode_tpl['url2']);

$bbcode_tpl['url3'] = str_replace('{URL}', '\\1', $bbcode_tpl['url']);
$bbcode_tpl['url3'] = str_replace('{DESCRIPTION}', '\\2', $bbcode_tpl['url3']);

$bbcode_tpl['url4'] = str_replace('{URL}', 'http://\\1', $bbcode_tpl['url']);
$bbcode_tpl['url4'] = str_replace('{DESCRIPTION}', '\\3', $bbcode_tpl['url4']);

/*********************
*********************/

// matches a [url]xxxx://www.phpbb.com[/url] code..
$patterns[] = "#\[url\]([\w]+?://([\w\#$%&~/.\-;:=,?@\]+]|\[(?!url=))*?)\[/url\]#is";
$replacements[] = $bbcode_tpl['url1'];

// [url]www.phpbb.com[/url] code.. (no xxxx:// prefix).
$patterns[] = "#\[url\]((www|ftp)\.([\w\#$%&~/.\-;:=,?@\]+]|\[(?!url=))*?)\[/url\]#is";
$replacements[] = $bbcode_tpl['url2'];

// [url=xxxx://www.phpbb.com]phpBB[/url] code..
$patterns[] = "#\[url=([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*?)\]([^?\n\r\t].*?)\[/url\]#is";
$replacements[] = $bbcode_tpl['url3'];

// [url=www.phpbb.com]phpBB[/url] code.. (no xxxx:// prefix).
$patterns[] = "#\[url=((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*?)\]([^?\n\r\t].*?)\[/url\]#is";
$replacements[] = $bbcode_tpl['url4'];

And 1 template:

<a href="{URL}" target="_blank" class="postlink">{DESCRIPTION}</a>

It's an errror in your pattern. Not sure what, but there's more to look at for you...