php pdo oop fetch data not working -

class php

<?php      class product extends db {          function viewcat(){              $dbcon = new db();             $connn = $dbcon->dbcon();              try {                 $stmt = $connn->prepare("select * `cat`");                  $resultcat = $stmt->execute();                  return $resultcat;              } catch (pdoexception $e) {                 echo 'error: ' . $e->getmessage();             }          }        }      ?> 

the view

<?php $menu = new product();  $resultmenux = $menu->viewcat();       foreach ($resultcatx $row) {         print_r($row);     }  ?> 

the error is

warning: invalid argument supplied foreach()

in class file should be, commented not fetching data

$stmt = $connn->prepare("select * `cat`");  $stmt->execute();  $resultcat = $stml->fetchall(pdo::fetch_assoc); // line missing  return $resultcat; 

and in view file answered shankhan

$resultmenux = $menu->viewcat();      foreach ($resultmenux $row) {     print_r($row); }