[PHP] Strings für BBCode

<?php
function unhtmlentities($str) {
 $str = str_replace('&lt;','<', $str );
 $str = str_replace('&gt;','>', $str );
 $str = str_replace('<br>','\n', $str);
 return $str;
}
function bbcode($str)
{
 # HTML Zeichen maskieren
 $str = htmlentities($str);

 # Smilies
 $str = str_replace(':)', '<img src="images/smilies/smile.gif" alt=":)"/>', $str);
 $str = str_replace(':lol:', '<img src="images/smilies/lol.gif" alt=":lol:"/>', $str);
 $str = str_replace(':cool:', '<img src="images/smilies/cool.gif" alt=":cool:"/>', $str);
 $str = str_replace(':thumb:', '<img src="images/smilies/mr_green.gif"alt=":thumb:" />', $str);
 $str = str_replace(':eek:', '<img src="images/smilies/eek.gif" alt=":eek:"/>', $str);

 # Formatierungen
 $str = preg_replace('#\[b\](.*)\[/b\]#isU', "<b>$1</b>", $str);
 $str = preg_replace('#\[i\](.*)\[/i\]#isU', "<i>$1</i>", $str);
 $str = preg_replace('#\[u\](.*)\[/u\]#isU', "<u>$1</u>", $str);
 $str = preg_replace('#\[hr\](.*)#isU', "<hr>", $str);
 $str = preg_replace('#\[center\](.*)\[/center\]#isU', "<center>$1</center>", $str);
 $str = preg_replace('#\[left\](.*)\[/left\]#isU', "<div align=left>$1</div>", $str);
 $str = preg_replace('#\[right\](.*)\[/right\]#isU', "<div align=right>$1</div>", $str);
 $str = preg_replace('#\[p\](.*)\[/p\]#isU', "<p>$1</p>", $str);
 $str = preg_replace('#\[qoute\](.*)\[/qoute\]#isU', "<table width=100%><tr><td bgcolor=#999999><b>Zitat:</b><br><font class=quote>$1</font></td></tr></table>", $str);
 $str = preg_replace('#\[color=(.*)\](.*)\[/color\]#isU', "<span style=\"color: $1\">$2</span>", $str);
 $str = preg_replace('#\[size=(8|10|12)\](.*)\[/size\]#isU', "<span style=\"font-size: $1 pt\">$2</span>", $str);
 

 # Links
 $str = preg_replace('#\[url\](.*)\[/url\]#isU', "<a href=\"$1\">$1</a>", $str);
 $str = preg_replace('#\[url=(.*)\](.*)\[/url\]#isU', "<a href=\"$1\">$2</a>", $str);

 # Grafiken
 $str = preg_replace('#\[img\](.*)\[/img\]#isU', "<img src=\"$1\" alt=\"$1\" />", $str);

 # Zitate
 $str = preg_replace('#\[quote\](.*)\[/quote\]#isU', "<div class=\"zitat\">$1</div>", $str);
 
 # Quelltext
 $str = preg_replace('#\[code\](.*)\[/code\]#isU', "<font class=forumsmall>Code:</font><br><textarea readonly style='width:98%; height:200px;'>".unhtmlentities('$1')."</textarea>", $str);
 
 # Listen
 $str = preg_replace('#\[list\](.*)\[/list\]#isU', "<ul>$1</ul>", $str);
 $str = preg_replace('#\[list=(1|a)\](.*)\[/list\]#isU', "<ol type=\"$1\">$2</ol>", $str);
 $str = preg_replace("#\[\*\](.*)\\r\\n#U", "<li>$1</li>", $str);
 
 # Enter
 $str = preg_replace('#\n#U',"<br>",$str);
 
 
 return $str;
}

?>