$match)
{
list($tag, $param, $innertext) = array($matches[1][$key], $matches[2][$key], $matches[3][$key]);
switch ($tag)
{
case 'b':
$replacement = "$innertext";
break;
case 'i':
$replacement = "$innertext";
break;
case 'size':
$replacement = "$innertext";
break;
case 'color':
$replacement = "$innertext";
break;
case 'center':
$replacement = "$innertext
";
break;
case 'quote':
$replacement = "$innertext
" . $param? "$param" : '';
break;
case 'url':
$replacement = '$innertext";
break;
case 'img':
list($width, $height) = preg_split('`[Xx]`', $param);
$replacement = "![](\"$innertext\")
';
break;
case 'video':
$videourl = parse_url($innertext);
parse_str($videourl['query'], $videoquery);
if (strpos($videourl['host'], 'youtube.com') !== FALSE)
$replacement = '';
if (strpos($videourl['host'], 'google.com') !== FALSE)
$replacement = '';
break;
}
$string = str_replace($match, $replacement, $string);
}
return $string;
}
?>