Not: Its work just one time in loop. Its return this error for other time.
I have a usermodel.php in models. When i use it like
$this->load->model("Usermodel");
$user = $this->Usermodel->quer(1);
it throw "Message: Undefined property: CI_Loader::$Usermodel"
When i use
$this->load->model("Usermodel");
$user = new Usermodel();
it throw "Message: Cannot redeclare class Users"
user class has construct and desturct functions. I call it in Usermodel.php file. And usermodel has construct and destruct functions.
<?php
class User {
public function __construct(){
parent::__construct();
}
private $id;
private $email;
private $name;
private $profilPic;
private $topPic;
private $gender;
private $birthday;
private function setid($id){
$this->id = $id;
}
private function getid(){
return $this->id;
}
private function setemail($email){
$this->email = $email;
}
private function getemail(){
return $this->email;
}
private function setname($name){
$this->name = $name;
}
private function getname(){
return $this->name;
}
private function setprofilPic($profilPic){
$this->profilPic = $profilPic;
}
private function getprofilPic(){
return $this->profilPic;
}
private function settopPic($topPic){
$this->topPic = $topPic;
}
private function gettopPic(){
return $this->topPic;
}
private function setgender($gender){
$this->gender = $gender;
}
private function getgender(){
return $this->gender;
}
private function setbirthday($birthday){
$this->birthday= $birthday;
}
private function getbirhday(){
return $this->birthday;
}
public function __set($name, $value){
$functionname = 'set'.$name;
return $this->$functionname($value);
}
public function __get($name){
$functionname = 'get'.$name;
return $this->$functionname();
}
public function __destruct(){}
}
?>
This is usermodel
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Usermodel extends CI_Model {
public function __construct(){
parent::__construct();
$this->load->view("Users.php");
$this->load->model("Dbmodel");
}
public function quer($id){
$uqcont = array("id" => $id);
$uiqcont = array("userID", $id);
$uq = $this->Dbmodel->control("user", $uqcont);
$uiq = $this->Dbmodel->control("userinfo", $uiqcont, $limit=1, 'userID');
$user = new Users();
if($uq->num_rows()==1){
$uq = $uq->result();
$user->id=$id;
$user->name=$uq[0]->name;
$user->email=$uq[0]->email;
$user->profilPic="girlprofil.png";
$user->topPic="arka.jpg";
}
if($uiq->num_rows()==1){
$uiq=$uiq->result();
if($uiq[0]->profilPic){
$user->profilPic = $uiq[0]->profilPic;
}
if($uiq[0]->topPic){
$user->topPic = $uiq[0]->topPic;
}
}
return $user;
}
public function __destruct(){}
}
?>
This is a part of my view.php
foreach($query->result() as $row){
$cont = array("id" => $row->userID);
$query = $this->Dbmodel->control("user", $cont);
$this->load->model("Usermodel");
$user = new Usermodel();
$user = $user->quer($row->userID);
$date = new datetime($row->date);
$date = $date->format("d.m.Y H:i:s");
//$query = $query->result();
//foreach($query as $qur){
echo '$user->name.'<br>'.$row->comment;
//}
//unset($user);
}
Please look to my error and help me to solve it.
the class User is being declared more than once, probably in the loop you were referring to.
is this line in the loop?
$this->load->model("Usermodel");
if so try moving it out of the loop.
The error is due to loading the model several times in the foreach loop. Load it only once then create instances of the class as many times as you wish
$this->load->model("usermodel");
foreach($query->result() as $row){
$cont = array("id" => $row->userID);
$query = $this->Dbmodel->control("user", $cont);
$user = new Usermodel();
$user = $user->quer($row->userID);
$date = new datetime($row->date);
$date = $date->format("d.m.Y H:i:s");
}
Then consider using small caps in your load->model().
I advise loading the data in the controller then passing the data to the view. Let the controller have most of the logic.For example in the controller
$this->load->model('usermodel');
$data['users'] = $this->usermodel->quer($id)->result();
$this->load->view('users_view', $data);
In the view its as simple as
foreach ($users as $user)
{
//logic e.g. echo $user->name;
}
$this->load->model("X") is doing something like following;
Check models directory if X.php exists and if it exists
it creates the class with the given name in our case "X", [ $this->X = new X(); ]
you can also pass the alternative name to the load->model method like
$this->load->model("X","my_x_model"), in that case the loader module will create
$this->my_x_model = new X();
It was just to give some information about "what happens when you trying to load a model"
You're getting an Undefined property because
$this->load->model("usermodel");
has to be in lowercase.
https://www.codeigniter.com/userguide3/general/models.html#loading-a-model
I change this "class Users" to "class users extends CI_Model" and i move "$this->load->model("usermodel") on over of loop. Then the problem is solved. Thank you for help.
Related
I know that I can cast an associative array to object doing this:
$user = (object) $_POST["user"];
I have a class User that has method getName, getEmail etc.
If I do
$user = (object) $_POST["user"];
$user->getName();
It gives this error
Fatal error: Call to undefined method stdClass::getName()
Can I do something like this?
$user = (user) $_POST["user"];
Thank you
Not directly. What you could do is make a new user and set all the info in the constructor of your user class
Class User {
public $name;
public $otherData;
function __construct ($userdata) {
$name = $userdata['name'];
$otherData = $userdata['otherData'];
}
function GetName() {
return $name;
}
}
Then you could call it like this:
$user = new User($_POST["user"]);
You can use something like this
<?php
Class User{
protected $name;
public function setName($name){
$this->name = $name;
}
public function getName(){
return $this->name;
}
}
$arr = ["name"=>"Niklesh"];
$abc = new User;
$abc->setName($arr["name"]);
var_dump($abc);
var_dump($abc->getName());
?>
Demo : https://eval.in/765496
I wrote a class
class User {
private $cars = array(); //store class Car 's object
public function getCars()
{
return $this->cars;
}
public function setCars($cars)
{
$this->cars = $cars;
}
}
class Car{
private $model;
public function getModel()
{
return $this->model;
}
public function setModel($model)
{
$this->model = $model;
}
}
$user = new User();
$cars = $user->getCars();
$cars[0]->getModel();
When I try to access getModel() php report "Call to undefined method stdClass::getModel()" .
Is there the best practice to deal with such case?
Edit:I filled the getter and setter. In fact, It's generated by phpstorm.
Edit:I tried again and it works well with the demo code below. The original code is too complicated to show. Maybe I caused by my misunderstanding of copying by value and by reference of array.
Please ignore this question. sorry.
class User {
private $cars = array(); //store class Car 's object
public function getCars()
{
return $this->cars;
}
public function setCars($cars)
{
$this->cars = $cars;
}
}
class Car{
private $model;
public function getModel()
{
return $this->model;
}
public function setModel($model)
{
$this->model = $model;
}
}
$user = new User();
$car = new Car();
$car->setModel("Ford");
$arr = $user->getCars();
array_push($arr,$car);
$user->setCars($arr);
foreach($user->getCars() as $car) {
var_dump($car->getModel());
}
You haven't shown your [Getter Setter ] code. You need to create one with something like:
public function setCars($val){
$this->cars = $val;
}
public function getCars(){
return $this->cars;
}
The same applies for getModel()
I have a question about Dependency Injection in PHP.
I currently have this 3 classes:
Staff.php
<?php
class Staff
{
public function name($id)
{
return 'returning staff with id ' . $id;
}
}
Projects.php
<?php
class Projects
{
..... projects related functions
}
ProjectsManager.php
<?php
class ProjectsManager
{
private $staff = null;
private $projects = null;
public function __construct(Staff $staff, Projects $projects)
{
$this->staff = $staff;
$this->projects = $projects;
}
public function staff()
{
return $this->staff;
}
public function projects()
{
return $this->projects;
}
}
Those classes are instantiated like this:
$staff = new Staff;
$projects = new Projects;
$app = new ProjectsManager($staff, $projects);
echo $app->staff()->name(5);
The above is working, but what I would like to do is something like this:
$employee = $app->staff(5);
echo $employee->name();
echo $employee->position();
echo $employee->email();
How can I handle the dependency to achieve this?
You can simply add the set function in Staff class and call it in ProjectsManager:
<?php
class Staff
{
private $id = null;
public function name()
{
return 'returning staff with id ' . $this->id;
}
public function setId($id)
{
$this->id = $id;
}
}
class Projects
{
//..... projects related functions
}
class ProjectsManager
{
private $staff = null;
private $projects = null;
public function __construct(Staff $staff, Projects $projects)
{
$this->staff = $staff;
$this->projects = $projects;
}
public function staff($id = null)
{
$this->staff->setId($id);
return $this->staff;
}
public function projects($val = null)
{
return $this->projects;
}
}
$staff = new Staff;
$projects = new Projects;
$app = new ProjectsManager($staff, $projects);
$employee = $app->staff(5);
echo $employee->name();
$employee = $app->staff()->name(5);
//$app is the ProjectsManager
//$app->staff() returns it's Staff object
//staff()->name(5) Invokes the Staff object's name function
//Returns 'Returning staff with id 5'
echo $employee->name();
echo $employee->position();
echo $employee->email();
To avoid confusion, I would also suggest prefix some of those functions with get (eg. $app->getStaff()->getFromId(#))
Also, be sure to modify staff()->name(#) to actually return an object and not a string.
Assume the connection to the database and all references to tables and cells is correct... how could I get something like this working?
class User
{
private $_display;
private $_email;
public function __construct($username)
{
$fetch_user = mysql_query("SELECT * FROM `registered_users` WHERE `user_name`='$username'");
$fetch_user = mysql_fetch_array($fetch_user);
$this->_display = $fetch_user['user_display'];
$this->_email = $fetch_user['user_email'];
}
}
$person1 = new User('username');
echo "Information: " . print_r($person1, TRUE);
the problem is it returns nothing. Doesn't thrown an error or anything when debugged. Is it viable method though? :S
Here is roughly what I would do:
<?php
class User{
private $username;
private $data;
public function __construct($username){
$this->username = $username;
if($this->valid_username()){
$this->load();
}
}
private function load(){
// Let's pretend you have a global $db object.
global $db;
$this->data = $db->query('SELECT * FROM registered_users WHERE user_name=:username', array(':username'=>$this->username))->execute()->fetchAll();
}
public function save(){
// Save $this->data here.
}
/**
* PHP Magic Getter
*/
public function __get($var){
return $this->data[$var];
}
/**
* PHP Magic Setter
*/
public function __set($var, $val){
$this->data[$var] = $val;
}
private function valid_username(){
//check $this->username for validness.
}
// This lets you use the object as a string.
public function __toString(){
return $this->data['user_name'];
}
}
How to use:
<?php
$user = new User('donutdan');
echo $user->name; //will echo 'dan'
$user->name = 'bob';
$user->save(); // will save 'bob' to the database
Bellow is a PHP script.
I tried to implement the Observer pattern (without MVC structure)... only basic.
The error which is encountered has been specified in a comment.
First I tried to add User objects to the UsersLibrary repository. There was a error such as User::update() does not exists or something.
Why is that error encountered? What fix should be applied and how?
interface IObserver {
public function update(IObservable $sender);
}
interface IObservable {
public function addObserver(IObserver $obj);
public function notify();
}
class UsersLibrary implements IObservable {
private $container;
private $contor;
//private $z;
public function __construct() {//IObserver $a) {
$this->container = array();
$this->contor = 0;
echo "<div>[constructing UsersLibrary...]</div>";
$this->addObserver(new Logger());
//$this->z = $a;
}
public function add($obj) {
echo "<div>[adding a new user...]</div>";
$this->container[$this->contor] = $obj;
$this->contor++;
$this->notify();
}
public function get($index) {
return $this->container[$index];
}
public function addObserver(IObserver $obj) {
$this->container[] = $obj;
}
public function notify() {
echo "<div>[notification in progress...]</div>";
foreach($this->container as $temp) {
//echo $temp;
#################################################################
$temp->update(); //--------ERROR
//Fatal Error: Call to a member function update() on a non-object.
#################################################################
}
//$this->container[0]->update();
//$this->z->update($this);
}
}
class User {
private $id;
private $name;
public function __construct($id, $name) {
$this->id = $id;
$this->name = $name;
}
public function getId() {
return $this->id;
}
public function getName() {
return $this->name;
}
}
class Logger implements IObserver {
public function __construct() {
echo "<div>[constructing Logger...]</div>";
}
public function update(IObservable $sender) {
echo "<div>A new user has been added.</div>";
}
}
$a = new UsersLibrary(); //new Logger());
//$a->add(new User(1, "DemoUser1"));
//$a->add(new User(2, "DemoUser2"));
$a->add("Demo");
echo $a->get(0);
//echo $a->get(0)->getName();
Your User class is not implementing interface IObserver and therefore is not forced to have the method update().
You have to instantiate a new User() in order to add it to the UsersLibrary:
$library = new UsersLibrary();
$user = new User(1, "Demo");
$library->add($user);
Also, you are mixing Users and Loggers into your UsersLibrary container. Maybe think about separating the containers for them?
You are passing a string instead of an object in your $a->add() call. You should either pass in an object, or alter the code in UserLibrary::add() to wrap it's argument in an appropriate object (or do an object lookup of it sees a string, for instance find a user with that name).
$user = new User(1, "Demo");
$a = new UsersLibrary();
$a->add($user);