function bbcode($text)
{
	// Suchmuster festlegen
	$search = array(
	'!\[b\](.*)\[\/b\]!isU',
	'!\[i\](.*)\[\/i\]!isU',
	'!\[u\](.*)\[\/u\]!isU',
	'!\[img\](.*)\[\/img\]!isU',
	'!\[url=(.*)\](.*)\[\/url\]!isU',
	'!\[url\](.*)\[\/url\]!isU',
	'!\[code\](.*)\[\/code\]!isU',
	);
	
	// Ersetzmuster festlegen
	$replace = array(
	'<b>$1</b>',
	'<i>$1</i>',
	'<u>$1</u>',
	'<img src="$1" border="0" alt="newsbild" />',
	'<a href="$1" target="_blank">$2</a>',
	'<a href="$1" target="_blank">$1</a>',
	'<code>$1</code>',
	);
  $neuertext = stripslashes($text);
  $neuertext = preg_replace($search,$replace,$neuertext);
  $neuertext = nl2br($neuertext);
  return $neuertext;
}