<?php



function bb_parse($string) {



while (preg_match_all('`\[(.+?)=?(.*?)\](.+?)\[/\1\]`', $string, $matches)) foreach ($matches[0] as $key => $match) {



list($tag, $param, $innertext) = array($matches[1][$key], $matches[2][$key], $matches[3][$key]);



switch ($tag) {



case 'b': $replacement = "<strong>$innertext</strong>"; break;



case 'i': $replacement = "<em>$innertext</em>"; break;



case 'size': $replacement = "<span style=\"font-size: $param;\">$innertext</a>"; break;



case 'color': $replacement = "<span style=\"color: $param;\">$innertext</a>"; break;



case 'center': $replacement = "<div class=\"centered\">$innertext</div>"; break;



case 'quote': $replacement = "<blockquote>$innertext</blockquote>" . $param? "<cite>$param</cite>" : ''; break;



case 'url': $replacement = '<a href="' . ($param? $param : $innertext). "\">$innertext</a>"; break;



case 'img':



list($width, $height) = preg_split('`[Xx]`', $param);



$replacement = "<img src=\"$innertext\" " . (is_numeric ($width)? "width=\"$width\" " : ''). (is_numeric($height)? "height=\"$height\" " : ''). '/>'; break;



case 'video':



$videourl = parse_url($innertext);



parse_str($videourl['query'], $videoquery);



if (strpos($videourl['host'], 'youtube.com') !== FALSE) $replacement = '<embed src="http://www.youtube.com/v/' . $videoquery['v']. '" type="application/x-shockwave-flash" width="425" height="344"></embed>';



if (strpos($videourl['host'], 'google.com') !== FALSE) $replacement = '<embed src="http://video.google.com/googleplayer.swf?docid=' . $videoquery['docid']. '" width="400" height="326" type="application/x-shockwave-flash"></embed>'; break;



} $string = str_replace($match, $replacement, $string);



}



return $string;



}



?>