PHP Problem Habevent

<?php
// Datenbankverbindung herstellen  include( "files/mysql.php" );  $db = new dbc( "files/config.php", $prefix );  define( "THIS_SELF", "index.php?" );  // Sitzung starten  session_name( "IVSESSID" );  session_start();    if( isset( $_GET['logout'] )) {    setcookie( $prefix."id", 0, time() - 1 );     setcookie( $prefix."key", 0, time() - 1 );      $_COOKIE = array();    session_unset();  } error_reporting( E_ALL & ~E_NOTICE & ~E_STRICT );// Konfiguration laden, alte optionsvariable verfügbar machen  foreach( $db->get( $prefix."base_conf" ) as $row )    $conf[$row['category']][$row['name']] = $row['value'];  $options = $conf['page'];  $exchange = array();  // Typen auslesen   foreach( $db->get( $prefix."base_type" ) as $row )     $types[$row['category']][$row['name']] = $row['id'];   // Einbinden wichtiger Dateien  $filetypes = array( "class", "function", "include", "library" );  foreach( $filetypes as $ft )    foreach( $db->get( $prefix."base_file", "`type` = '".$types['filetype'][$ft]."' AND `inc_front` = 1", -1, "`type`, `id`" ) as $file )      eval( $file['source'] );
// Funktionsdeklarationen         // Fehlerfunktion    function page_error( $msg ) {      global $db, $prefix, $types, $conf;      $error_template  = $db->get( $prefix."content_template", "`type` = '{$types['template']['error']}'", 1 );      $template_source = $db->get( $prefix."content_template_source", "`style` = '{$conf['system']['style']}' AND `template` = '{$error_template['id']}'", 1 );             if( $template_source ) return str_replace( "{REASON}", $msg, $template_source['source'] );      else return "Error: ".$msg;    }        // Sicherheitsfunktion zu Panel includen    function parse_panel( $panel, $options, $db, $prefix, $layer, $types, $conf, $userdata  ) {          global $exchange;          if( !empty( $panel['template'] )) {        $panel_template  = $db->get( $prefix."content_template", "`id` = '{$panel['template']}' AND `type` = '{$types['template']['panel']}'", 1 );        $template_source = $db->get( $prefix."content_template_source", "`style` = '{$conf['system']['style']}' AND `template` = '{$panel_template['id']}'", 1 );        $template = str_replace( "{TITLE}", $panel['name'], $template_source['source'] );        $template = explode( "{BODY}", $template );      }                 if( $script = $db->id_get( $prefix."base_script", $panel['script'] )) {        if( $script_source = $db->get( $prefix."base_file", "`id` = '{$script['script']}' AND `type` = '{$types['filetype']['script']}'", 1 )) {          echo $template[0];          $panelvars = $db->get_assoc( $prefix."content_variable", "panel = {$panel['id']}", "value", "name" );          	      eval( $script_source['source'] );	      echo $template[1];        } else echo "<b>Fatal Error:</b> Scriptfile {$script['script']} not found.";      } else echo "<b>Fatal Error:</b> Script {$panel['script']} not found.";    }      // Sortierfunktion	function order_elements($a, $b) {      if ( $a['prio'] == $b['prio'] ) return 0;      return ( $a['prio'] > $b['prio'] ) ? 1 : -1;    }// Ende Funktionsdeklarationen      // Sitzung prüfen  if( !empty( $_SESSION['user_id'] )) {	    if( $userdata = $db->id_get( $prefix."user_data", $_SESSION['user_id'] )) {          if( $_SESSION['user_ip'] != $_SERVER['REMOTE_ADDR'] ) {        $userdata = false;        session_unset();      } else {        foreach( $db->fetch_query( "SELECT prf.name, dtl.value FROM ".$prefix."user_details dtl JOIN ".$prefix."user_profil prf ON (dtl.field = prf.id) WHERE dtl.user = '$userdata[id]'" ) as $detail )            $userdata['details'][$detail['name']] = $detail['value'];      }    } else session_unset();  }  
// Wartungsmodus  if( $conf['system']['wartung'] && !( $userdata['type'] & 2 )) {    echo page_error( $conf['system']['wreason'] );  } else {      if( isset( $_POST['login_name'] ) && isset( $_POST['login_pass'] ))       if( $logindata = $db->get( $prefix."user_data", "name = '$_POST[login_name]'", 1 ))        if( $logindata['pass'] == crypt( $_POST['login_pass'], $logindata['pass'] ))          if( $logindata['type'] & 1 ) {	            $query = array( "last_login" => time(), "last_ip" => $_SERVER['REMOTE_ADDR'] );            $db->id_update( $prefix."user_data", $query, $logindata['id'] );                        $_SESSION['user_id'] = $logindata['id'];            $_SESSION['user_ip'] = $_SERVER['REMOTE_ADDR'];                        if( $_POST['relogin'] ) {              setcookie( $prefix."id", $logindata['id'], time() + 3600 * 24 * 7 );              setcookie( $prefix."key", md5( $logindata['pass'] ), time() + 3600 * 24 * 7 );             }                        header( "LOCATION: ".THIS_SELF );            $db->close();            exit();          } else $exchange['loginerror'] = "Der User ist nicht f&uuml;r das Backend freigegeben!";        else $exchange['loginerror']  = "Userdaten ung&uuml;ltig!";      else $exchange['loginerror']  = "Userdaten ung&uuml;ltig!";
    // Userdaten leeren wenn es kein Frontenduser ist      if( !( $userdata['type'] & 1 )) unset( $userdata );        	// Aktuelle Seite Laden	  $page  = (int) $_GET['page'];	  $layer = $db->get( $prefix."content_layer", "id = '{$page}' AND status != 1", 1 );      if( $layer['status'] == 2 && $userdata ) unset( $layer );      if( $layer['status'] == 3 && !$userdata ) unset( $layer );	  if( !$layer ) $layer = $db->id_get( $prefix."content_layer", $conf['system']['frontpage'] );  	// Umlaute Funktion		  function sonderzeichen($input){ 	  $sonderzeichen = array("ä", "ö", "ü", "ß"); 	  $neuezeichen = array("&auml;","&ouml;","&uuml;","&szlig;"); 	  $output  = str_replace($sonderzeichen, $neuezeichen, $input); 	  return $output; }  	// Template ermitteln	  if( $layer ) {        $template = $layer['template']; 		$parent = $layer;				while( empty( $template )) {		  if( !$parent['parent'] ) {		    $template = $conf['system']['pagetemplate']; break;  		  } elseif( $parent = $db->id_get( $prefix."content_layer", $parent['parent'] )) {		    $template = $parent['template'];		  } else {		    $db->close(); die( page_error( "Es gibt Unstimmigkeiten in der Datenbank:<br><i>Inkorrekte Referenz im Layersystem!</i>" ));	      }   	    }	  		define( "LAYER_SELF", THIS_SELF."page=".$layer['id'] );		define( "PAGE_SELF", THIS_SELF."page=".$layer['id'] );				if( $source = $db->get( $prefix."content_template_source", "`template` = '{$template}' AND `style` = '{$conf['system']['style']}'", 1 )) {
		  $panelgroups = $db->get( $prefix."content_group" ); 		  $parent = $layer; 		  $panels = array();		  $source = $source['source'];		  		// Optionsn ins Template einbinden		  foreach( $options as $key => $opt )		    $source = str_replace( "{".strtoupper($key)."}", $opt, $source );		  		// Panelgroups Sortieren		  foreach( $panelgroups as $i => $pg ) { 		    $panels[$pg['id']] = array();			$panelgroups[$i]['prio'] = strpos( $source, "{".strtoupper( $pg['token'] )."}" );		  } usort( $panelgroups, "order_elements" );		  		// Panels auslesen		  while( $parent ) {		    foreach( $db->get( $prefix."content_panel", "layer = '{$parent['id']}' AND status != 1" ) as $pan )              if( $pan['status'] == 0 || ( $pan['status'] == 2  && !$userdata ) || ( $pan['status'] == 3  &&  $userdata ))			    $panels[$pan['group']][] = $pan;			$parent = $db->id_get( $prefix."content_layer", $parent['parent'] );		  }		  		// Mainlayer Panels auslesen		  foreach( $db->get( $prefix."content_panel", "layer IS NULL" ) as $pan )            if( $pan['status'] == 0 || ( $pan['status'] == 2  && !$userdata ) || ( $pan['status'] == 3  &&  $userdata ))			  $panels[$pan['group']][] = $pan;			// Ausgabe		  foreach( $panelgroups as $pg )		    if( $pg['prio'] !== false ) {			  $ausgabe = explode( "{".strtoupper( $pg['token'] )."}", $source, 2 );			  echo $ausgabe[0]; $source = $ausgabe[1];			  usort( $panels[$pg['id']], "order_elements" );			  			  foreach( $panels[$pg['id']] as $panel )				parse_panel( $panel, $options, $db, $prefix, $layer, $types, $conf, $userdata  );			}				  echo $source;	        } else echo page_error( "Es liegt ein interner Fehler vor:<br><i>".htmlspecialchars( "Das Template '{$template}' in Style '{$conf['system']['style']}' kann nicht geladen werden!" ) ."</i>" );      } else echo page_error( "Es liegt ein interner Fehler vor:<br><i>Die Startseite kann nicht geladen werden!</i>" );    }
// Datenbankverbindung schließen  $db->close();
?>