php - Fatal error: Call to undefined method DB::get() -

i accessing db class in index.php.

checkout files:

db.php

<?php namespace blog\db;  class db {      /**     * return db     * @var object     */     private $db;     /**     * results limit.     * @var integer     */     public $limit = 5;       public function __construct($config){          $this->connect($config);         }      private function connect($config){         try{             if ( !class_exists('mongo')){                 echo ("the mongodb pecl extension has not been installed or enabled");                 return false;             }             $connection=  new \mongoclient($config['connection_string'],array('username'=>$config['username'],'password'=>$config['password']));             return $this->db = $connection->selectdb($config['dbname']);         }catch(exception $e) {             return false;         }     }     /**      * 1 article id      * @return array      */     public function getbyid($id,$collection){         // convert strings of right length mongoid         if (strlen($id) == 24){             $id = new \mongoid($id);         }         $table = $this->db->selectcollection($collection);         $cursor  = $table->find(array('_id' => $id));         $article = $cursor->getnext();          if (!$article ){             return false ;         }         return $article;     }     /**      * data in collection , paginator      *      * @return multi array       */     public function get($page,$collection){          $currentpage = $page;         $articlesperpage = $this->limit;          //number of article skip beginning         $skip = ($currentpage - 1) * $articlesperpage;           $table = $this->db->selectcollection($collection);          $cursor = $table->find();         //total number of articles in database         $totalarticles = $cursor->count();          //total number of pages display         $totalpages = (int) ceil($totalarticles / $articlesperpage);           $cursor->sort(array('saved_at' => -1))->skip($skip)->limit($articlesperpage);         //$cursor = iterator_to_array($cursor);         $data=array($currentpage,$totalpages,$cursor);          return $data;     }     /**      * create article      * @return boolean      */     public function create($collection,$article){          $table   = $this->db->selectcollection($collection);         return $result = $table->insert($article);     }     /**      * delete article via id      * @return boolean      */     public function delete($id,$collection){         // convert strings of right length mongoid         if (strlen($id) == 24){             $id = new \mongoid($id);         }         $table   = $this->db->selectcollection($collection);         $result = $table->remove(array('_id'=>$id));         if (!$id){             return false;         }         return $result;      }     /**      * update article      * @return boolean      */     public function update($id,$collection,$article){         // convert strings of right length mongoid         if (strlen($id) == 24){             $id = new \mongoid($id);         }         $table   = $this->db->selectcollection($collection);         $result  = $table->update(                 array('_id' => new \mongoid($id)),                  array('$set' => $article)         );         if (!$id){             return false;         }         return $result;      }     /**      * create , update comment      * @return boolean      */     public function commentid($id,$collection,$comment){          $postcollection = $this->db->selectcollection($collection);         $post = $postcollection->findone(array('_id' => new \mongoid($id)));          if (isset($post['comments'])) {             $comments = $post['comments'];         }else{             $comments = array();         }                            array_push($comments, $comment);          return $postcollection->update(                         array('_id' => new \mongoid($id)),                          array('$set' => array('comments' => $comments))         );     }          public function receive($page,$collection){          $currentpage = $page;         $articlesperpage = $this->limit;          //number of article skip beginning         $skip = ($currentpage - 1) * $articlesperpage;           $table = $this->db->selectcollection($collection);          $cursor = $table->find();         //total number of articles in database         $totalarticles = $cursor->count();          //total number of pages display         $totalpages = (int) ceil($totalarticles / $articlesperpage);           $cursor->sort(array('saved_at' => -1))->skip($skip)->limit($articlesperpage);         //$cursor = iterator_to_array($cursor);         $data=array($currentpage,$totalpages,$cursor);          return $data;     } } 

index.php:

<?php require_once 'auth.php'; include '../app1.php'; include '../config.php'; include '../db.php'; require_once '../vendor/markdown/markdown.inc.php';   use michelf\markdownextra,     michelf\markdown;  $url_action = (empty($_request['action'])) ? 'login' : $_request['action'];  if (isset($url_action)) {     $action = new auth;     if (is_callable(array($action,$url_action))) {         call_user_func(array($action,$url_action));     } else {         echo 'function not exist, request terminated';     } }  if (is_array($_session) &&$_session['username'] ==userauth) {      $data = array();      $status = (empty($_get['status'])) ? 'dashboard':$_get['status'];      switch ($status) {         case 'create':              if ($_server['request_method'] === 'post' ) {                 $article               = array();                 $article['title']      = $_post['title'];                 $article['html']    = markdown::defaulttransform($_post['content']);                 $article['content']    =$_post['content'];                  $article['saved_at'] = new mongodate();                  if ( empty($article['title']) || empty($article['content']) ) {                     $data['status'] = 'please fill out both inputs.';                 }else {                     // create new row in table                     $db->create('posts',$article);                     $data['status'] = 'row has been inserted.';                 }             }             $layout->view('admin/create', $data);             break;         case 'edit':             $id   = $_request['id'];             $data['status'] =null;              if ($_server['request_method'] === 'post' ) {                  $article               = array();                 $article['title']      = $_post['title'];                 $article['html']    = markdown::defaulttransform($_post['content']);                 $article['content']    =$_post['content'];                 $article['saved_at'] = new mongodate();                  if ( empty($article['title']) || empty($article['content']) ) {                     $data['status'] = 'please fill out both inputs.';                 }else {                     // create new row in table                     $db->update($id,'posts',$article);                     $data['status'] = 'row has been update.';                 }             }            $layout->view('admin/edit',array(                 'article' => $db->getbyid($id,'posts'),                 'status'  => $data['status']             ));             break;         case 'delete':             $id = $_get['id'];             $status = $db->delete($id,'posts');             if ($status ==true ) {                 header("location:index");             }             break;         default:             $currentpage = (isset($_get['page'])) ? (int) $_get['page'] : 1; //current page number             $data = $db->get($currentpage,'posts');               $layout->view('admin/dashboard',array(                 'currentpage'  => $data[0],                 'totalpages'   => $data[1],                 'cursor'       => $data[2],              ));         break;     } } 

index.php inside folder i.e ../admin/index.php , db.php lies in root folder of web directory.

fatal error: call undefined method db::get() in c:\xampp\htdocs\admin\index.php on line 82.

error line: $data = $db->get($currentpage,'posts');

i can't see in index.php create $db object calling db constructor.

you need @ least @ beginning of code 1 line this:

$db = new db($config);