How do you script BB Code?

[Jaxel]

Okay... lets say I want to make a bbcode... [VIDEO]536[/VIDEO]

I want to parse some PHP code on this code. How would I handle this?

PHP Code:

function fetch_bbcode_video($videoid)
{
 require_once(DIR . '/includes/class_videosharingservice.php');
 global $vbphrase, $vbulletin, $show, $stylevar;
 if (!$videoinfo = $vbulletin->db->query_first("
  SELECT video.* 
  FROM " . TABLE_PREFIX . "video AS video 
  WHERE video.videoid = '" . $videoid . "'")
 )
 {
  return false;
 }
 $classname = "vB_VideoSharingService_$video[videoservice]";
 $obj = new $classname($vbulletin);
 $embedcode = $obj->fetch_embedcode($videoinfo['videoidservice']);
 $video['cattitle'] =& $vbulletin->videocats["$video[videocategoryid]"]['title'];
 $video['caturl'] = construct_category_url($vbulletin->videocats["$video[videocategoryid]"]);
 $video['url'] = construct_video_url($video);
 $video['userurl'] = construct_user_url($video);
 if ($video['timelength'] == 0)
 {
  $video['timelength'] = "???";
 }
 else
 {
  $duration = $video['timelength'];
  $minutes = floor($duration / 60);
  $seconds = $duration % 60;
  $seconds = str_pad($seconds, 2, "0", STR_PAD_LEFT); 
  $video['timelength'] = "$minutes:$seconds";
 }
 eval('$html = "' . fetch_template('bbcode_video') . '";');
 return $html;
}