php - Fatal error: Call to undefined method - does not completely -

this how able update quick , easy, select database , same time updater content have right in.

this how error: fatal error: call undefined method mebe::boxforside() in /home/jesperbo/public_html/blabla.dk/admin_forside.php on line 30

admin_forside.php show here:

<?php   $forside_tekst = $mebe->boxforside(); ?> 

into large file information looks this: *fun_db.php*

function boxforside()     {         if ($stmt = $this->mysqli->prepare("select `tekst` `forside_tekst`")) {              $stmt->execute();              $stmt->bind_result($tekst);              while ($stmt->fetch()) {             ?>             <form action="#" method="post">                 <textarea name="tekst" cols="20" rows="15" class="new" style="width:100%;"><?php echo $tekst;?></textarea>                 <input type="submit" name="opret" value="opret blog" class="new"></td>             </form>             <?php             }              $stmt->close();          } else {             echo 'der opstod en fejl erklæringen: ' . $this->mysqli->error;         }               if(isset($_post["opret"]))             {                  if ($stmt = $this->mysqli->prepare('update `forside_tekst` set `tekst`=? `id`=?')) {                      $stmt->bind_param('si', $tekst, $id);                      $tekst = $_post["tekst"];                      $id = 1;                      $stmt->execute();                      $stmt->close();                  }             }      } 

when download files looks on toppe af admin_forside.php

session_start(); require_once ("indhold/inc/fun_db.php"); //download alle files site. $mebe = new mebe; $db = $mebe->db_c(); error_reporting(e_error); //take alle error away 

i not see why can not work.