PHP: In shopping cart, Fatal error: Call to undefined function getCart() -

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recently start php , not because gives me error. code onyl show articles , total price of shopping cart when reload page, using phpsessid, if have better idea or alternative function, appreciated!

index.php

<?php require("php/db_functionss.php"); ?> <!doctype html> <html lang="es"> <head>     ........ </head> <body>     <div id="infoshopcart">        <a href="contshopping"><img src="img/shopping_cart.png" width="30px"/>        artículos: <b id="cantarticles">0</b>        total: $ <b id="totalpricearticles">0.00</b></a>        <?php getcart(); ?>     </div> ..... .... </body> </html>

and db_functions.php 

session_start(); $sessionid = $_cookie['phpsessid'];      class db_functions {          private $db;         //put code here         //constructor         function __construct() {             require_once 'db_connect.php';             //connecting database             $this->db = new db_connect();             $this->db->connect();         }         //destructor         function __destruct() {          }       public function getcart(){             $query ="select * carrito order id_pelicula";             $result = mysql_query($query) or die(mysql_error());              $no_of_rows = mysql_num_rows($result);             if($no_of_rows > 0) {                 while ($row = mysql_fetch_assoc($result)) {                     $totalitems     = $totalitems + 1;                     $movietotalprice    = $movietotalprice + $row['precio_pelicula'];                 }                 echo ("artículos: <b id='cantarticles'>"+$totalitems+"</b><otal: $ <b id='totalpricearticles'>"+$totalprice+"</b></a>");             } else {                 return false;             }         }

you should initialize object , use method. so:

<div id="infoshopcart">    <a href="contshopping"><img src="img/shopping_cart.png" width="30px"/>    artículos: <b id="cantarticles">0</b>    total: $ <b id="totalpricearticles">0.00</b></a>    <?php        $db_object = new db_functions();        $db_object->getcart();    ?> </div>

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