php - db class function not recognised -

getting an:

fatal error: call undefined method userscontroller::select() application/models/user.php on line 27

it looks userscontroller not sending select function db.class.php have inside library folder.

the db.class.php being loaded not in case.

code inside usercontroller.php class is:

class user extends model {          /**  * login method  *  * @todo: update last_login_time  * @todo: add hashing  */ public function user_login() {      $username = $_post['data']['user']['username'];     $password = $_post['data']['user']['password'];       $bind = array(         ":username" => $username,     );     $result = $this->select("users", "username = :username", $bind);      //check password returned db against password entered     if (bcrypt::checkpassword($password, $result[0]['password']) == true) {         session::init();          session::set('user_logged_in', true);         session::set('user_id', $result[0]['id']);         session::set('user_name', $result[0]['username']);         session::set('user_permission', $result[0]['permission']);         session::set('user_role', $result[0]['role']);          return true;     } else {         return false;     } }   /**  * log out process, deletes cookie, deletes session  *  * @todo implement rememberme cookie  */ public function logout() {     // set remember-me-cookie ten years ago (3600sec * 365 days * 10).     // that's best practice kill cookie via php     // @see http://stackoverflow.com/a/686166/1114320     //setcookie('rememberme', false, time() - (3600 * 3650), '/', cookie_domain);      session::init();     // delete session     session::destroy(); }  } 

select function inside db.class.php

public function select($table, $where="", $bind="", $fields="*") {     $sql = "select " . $fields . " " . $table;     if(!empty($where))         $sql .= " " . $where;     $sql .= ";";     return $this->run($sql, $bind); } 

i think maybe reference $this->select() i'm learning.

the reason error select(), can tell, not method of user, model, or other parent in hierarchy of model.

instead in db.class.php.

given current code, suggest injecting db object user/model , delegate object directly.

for example:

class model {     public function __construct(db $db) {         $this->db = $db;     } } 

then, resolve error, in user do:

$result = $this->db->select("users", "username = :username", $bind); 

note: incomplete. you'll need fill in few blanks. since learning, suggest reading:

• object inheritance in php
• dependency injection in php
• what purpose of delegation pattern?

also, .class.php old naming convention used in php 4. not this. instead, follow psr-4 naming convention.