Fehler nach Einbau vom Teplate-Hack

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<?php
class tpl {

 var $templates   = array();
 var $subvariablepackid = 0;
 var $templatefolders = array();
 var $imagefolders = array();
 var $images = array();

 /* constuctor */
 function tpl($templatepackid=0,$subvariablepackid=1,$prefix="") {
  global $db, $n;
  $this->subvariablepackid = $subvariablepackid;
  if(!$templatepackid) $this->templatefolders[] = $prefix."templates";
  $result = $db->query("SELECT * FROM bb".$n."_templatepacks");
  while($row = $db->fetch_array($result)) $templatepacks[$row['templatepackid']] = $row;
  while($templatepackid != 0) {
   $this->templatefolders[] = $prefix.$templatepacks[$templatepackid]['templatefolder'];
   if($templatepacks[$templatepackid]['parent_templatepackid']==-1) {
    $this->templatefolders[] = $prefix."templates";
	break;
   }
   else $templatepackid = $templatepacks[$templatepackid]['parent_templatepackid'];
  }
  $result = $db->query("SELECT * FROM bb".$n."_subvariablepacks LEFT JOIN bb".$n."_subvariables USING (subvariablepackid) WHERE variable = '{imagefolder}'");
  while($row = $db->fetch_array($result)) $subvariablepacks[$row['subvariablepackid']] = $row;
  $varlist = "''";
  while($subvariablepackid != 0) {
   $this->imagefolders[] = $subvariablepacks[$subvariablepackid]['substitute'];
   $subvariablepackid = $subvariablepacks[$subvariablepackid]['parent_subvariablepackid'];
  }
 }

 /* get template */
 function get($templatename) {
  if(!isset($this->templates[$templatename])) {
   if(   for ($j=0;$j<count($this->templatefolders);$j++) {
    if(file_exists($this->templatefolders[$j]."/$templatename.tpl")) {
	 $this->templates[$templatename]=str_replace("\"","\\\"",implode("",file($this->templatefolders[$j]."/$templatename.tpl")));
	 break;
	}
   }
  }
  return $this->templates[$templatename];
 }

 /* print template */
 function output($template) {
  headers::send();
  $template = $this->replacevars($template);
  print($template);
 }

 /* replace vars */
 function replacevars($template) {
  global $db, $n, $pmpopup, $PHP_SELF;

  $hash="";
  if(strstr($template,"<title>")) {

   $hash = md5(uniqid(microtime()));
   $x = strpos($template,"<title>");
   $y = strpos($template,"</title>");

   $temp = substr($template,$x,$y-$x+8);
   $template = substr($template,0,$x) . $hash . substr($template,$y+8);
  }

    preg_match_all("/(\{imagefolder\})\/([^\"\?\&]*\.(gif|jpg|jpeg|bmp|png))/siU", $template, $matches);
  for($j=0; $j<count($matches[0]); $j++) {
   if(!isset($this->images[$matches[2][$j]])) {
    for ($k=0;$k<count($this->imagefolders);$k++) {
     if(file_exists($this->imagefolders[$k]."/".$matches[2][$j])) {
	  $this->images[$matches[2][$j]] = $this->imagefolders[$k]."/".$matches[2][$j];
      break;
     }
    }
   }
   $tmp = $matches[1][$j]."/".$matches[2][$j];
   $template = str_replace($tmp,$this->images[$matches[2][$j]],$template);
  }
  $result = $db->query("SELECT variable,substitute FROM bb".$n."_subvariables WHERE subvariablepackid = '".$this->subvariablepackid."'");
  while($row = $db->fetch_array($result)) {
  	if(isset($row['variable']) && $row['variable'] && isset($row['substitute'])
  	&& $row['substitute']) {
  		switch($row['variable']) {
    		case "<body": 
    		$template = $this->str_replace($row['variable'],$row['substitute'],$template); break;
    		case "{css}": 
    		$template = $this->str_replace($row['variable'],$row['substitute'],$template); break;
    		case "{cssfile}": 
    		$template = $this->str_replace($row['variable'],$row['substitute'],$template); break;
    		case "{imagelogo}": 
    		$template = $this->str_replace($row['variable'],$row['substitute'],$template); break;
    		case "{!DOCTYPE}": 
    		$template = $this->str_replace($row['variable'],$row['substitute'],$template); break;
                case "{imagefolder}": break;
    		default: 
    		$template = str_replace($row['variable'],$row['substitute'],$template);
   		}
   	}
  }

  if($hash!="") $template = str_replace($hash,$temp,$template);
  return $template;
 }

 function str_replace($search,$replace,$text) {
  if(strstr($text,$search)) {
   $x = strpos($text,$search);
   return substr($text,0,$x) . $replace . substr($text,$x+strlen($search));
  }
  else return $text;
 }
}
?>

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 /* get template */
 function get($templatename) {
  if(!isset($this->templates[$templatename])) {
   if(   for ($j=0;$j<count($this->templatefolders);$j++) {
    if(file_exists($this->templatefolders[$j]."/$templatename.tpl")) {
	 $this->templates[$templatename]=str_replace("\"","\\\"",implode("",file($this->templatefolders[$j]."/$templatename.tpl")));
	 break;
	}
   }
  }
  return $this->templates[$templatename];
 }