I have defined static variable in controller but when I use that variable in functions it is giving undefined variable error.
Controller
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Quiz extends Admin_Controller {
private static $secure_key = "aXXXXXXXXc";
public function __construct()
{
parent::__construct();
}
public function edit($id)
{
try
{
$token = JWT::encode($postdata, $secure_key);
echo "<pre>";print_r($token);exit;
}
catch(Exception $e){
$this->data['error'] = $e->getMessage();
redirect('/','refresh');
}
}
}
$token gets printed properly with jwt but I am getting an error
Undefined variable: secure_key
I tried different methods to define $secure_key as
public static $secure_key = "aXXXXXXXc;
static $secure_key = "aXXXXXXXc;
I tried to define $secure_key in constructor also as
$secure_key = "aXXXXXXXc;
but no use. Why so? Please help. I am using codeigniter 3
Recommended Method (Based on Security)
Define variables in config.php and access it. This will work like Global Variable
$config['secure_key'] = 'myKey';
$this->config->item('secure_key'); # get
$this->config->set_item('secure_key', 'NewKey'); # set
Access it like this
$this->$secure_key
As per Comment by cd001
self::$secure_key
If function
$this->function_name();
Since $secure_key is declared as static inside your class. So it can be accessed using self or className as
self::$secure_key
or
Quiz::$secure_key
Related
I have read all related question, but failed to remove the bug from my code. Please guide me about possible error in my code.
When I try to call following code, it reports Error: Call to undefined method SessionManager::close() in E:\wamp64\www\mjs-cms\private\systemcore\helper\SessionManager.php on line 22 instead of "tried to call close".
Thanks in advance.
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class SessionManager{
public function __construct() {
session_start();
}
public function is_exist($a){
return isset($_SESSION["system".$a]);
}
public function add($a,$b){
$_SESSION["system".$a]=$b;
}
public function addCookies($a,$b){
setcookie($a, $b, time() + (86400 * 30), "/"); // 86400 = 1 day
}
public function sessionKey(){
return session_id();
}
public function value($k){
if(!isset($_SESSION[$k]))
$this->close("SESSION_NOT_DEFINED".__LINE__);
return $_SESSION[$k];
}
public function __get($key)
{
echo "tried to call $key";
return get_instance()->$key;
}
}
__get method is for accessing undeclared properties of a class.
For calling undeclared functions is __call or __callStatic.
public function __call($method_name, $arguments)
{
echo "tried to call: $method_name";
}
If you want to use __get - you must call for undefined property. In this case it is not
SessionManager::close() // call method `close()`
It must be:
$sm = new SessionManager;
$sm->propertyName; // trying to access undefined property `propertyName` of an object
Take into consideration that
Property overloading only works in object context.
which means that trying to access static property like
SessionManager::staticProperty;
will not work with __get.
I am making a website in which i have to save a global variable.
I am using this person code globals_helper.php custom global variable class
But i always get static variable value null.
globals_helper.php:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
// Application specific global variables
class Globals
{
private static $authenticatedMemberId = null;
private static $initialized = false;
private static function initialize()
{
if (self::$initialized)
return;
self::$authenticatedMemberId = null;
self::$initialized = true;
}
public static function setAuthenticatedMemeberId($memberId)
{
self::initialize();
self::$authenticatedMemberId = $memberId;
}
public static function authenticatedMemeberId()
{
self::initialize();
return self::$authenticatedMemberId;
}
}
I have done all the steps like add globals_helper.php in helper folders and updated autoload file. Now I am trying to access those static variable from a custom library "Ctrl_utility" function "get_search_term" and my controllers calling get_search_term function
Ctrl_utility.php
class Ctrl_utility {
protected $CI;
public static $static_search = "";
public function __construct()
{
// Assign the CodeIgniter super-object
$this->CI =& get_instance();
}
public function get_search_term($searchTerm){
$searchTerm = $this->CI->security->xss_clean(htmlspecialchars($searchTerm));
if (isset($searchTerm) && strlen($searchTerm)>0) {
Globals::setAuthenticatedMemeberId($searchTerm);
} else {
$searchTerm = Globals::authenticatedMemeberId();
}
return $searchTerm;
}
One of my controller and they all have class ctrl_utility, get_search_term function:
class Blog_controller extends CI_Controller{
public function __construct() {
parent::__construct();
$this->load->model('blogs_model');
}
public function index(){
//Get SearchTerm Values
$searchTerm = $this->ctrl_utility->get_search_term($this->input->post('searchTerm'));
//Get Url First Parameter
$start = $this->ctrl_utility->get_url_first_parameter();
// Get Data from solr
$rows = 10;
$data = $this->blogs_model->solrData($start, $rows, $searchTerm); //give start of documents
//Pagination
$this->pagination->initialize($this->ctrl_utility->pagination_config($this->uri->segment(1), $rows, $data['found']));
//Views
$this->load->view('tabs/blogs', $data);
}
}
Am i doing something wrong?
Now when it comes to define them in CodeIgniter, there are several ways do that. I’ve listed some of them below:
Create your own file in application/libraries in which class constructor contains an array as an argument. Now create a new file in /application/config with same name as given in application/libraries and declare your global variables in it. Now to use these variables, autoload the newly created library.
Create your own file in application/core and declare the global variables in it. Than in controller you need to extend your file name instead of CI_Controller.
If the Global Variables are true constants, just add them in application/config/constants.php file and name them in all uppercase like the others are defined.
If you want to set application constants create new config file and add the variables. Now load it as $this->config->load(‘filename’); And access those variables as
$this->config->item(‘variable_name’);
Instead of creating helper create a library
Step 1: First of all, open application/libraries and create a custom
class name globals.php. It contains a constructor function which
contains an array as an argument.
<?php
class Globals {
// Pass array as an argument to constructor function
public function __construct($config = array()) {
// Create associative array from the passed array
foreach ($config as $key => $value) {
$data[$key] = $value;
}
// Make instance of CodeIgniter to use its resources
$CI = & get_instance();
// Load data into CodeIgniter
$CI->load->vars($data);
}
}
?>
Step 2: Now to make config file, open application/config and create
file as globals.php and write the code given below. This file contains
the config variable which will be passed as an array to constructor of
Globals class where its keys and values are stored in $data
<?php
// Create customized config variables
$config['web_Address']= 'https://www.example.com/blog';
$config['title']= 'CodeIgniter Global Variable';
?>
When constructor function loads, it will take the config variables
from the config file in order to use these variables anywhere.
Note: Name of the above file must be same as the class created in
libraries folder otherwise the code will not work.
Step 3: But before using these variables we have to autoload the newly
created library globals as given below.
And load library in autoload
$autoload['libraries'] = array('globals');
Now, you can use global variables in your controller
<?php
class CI_Global_Variable_Tutorial extends CI_Controller{
public function __construct() {
parent::__construct();
}
// Load view page
public function index() {
$this->load->view('show_global_variables');
}
}
?>
Views : show_global_variables.php
In view page, we can use global variables according to our need.
<?php
echo "Title of the blog post : ".$title;
echo "<a href='$web_Address'>"."Click here to go to blog page"."</a>";
?>
Trying to get the property inside a function so not sure how to do it.
Here is my class:
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class Data extends CI_Controller {
public $data;
public function __construct() {
parent::__construct();
$this->load->model('months');
$this->load->driver('cache');
}
}
public function graph1() {
$this->data = $this->months->get_months();
$this->layout->view('graph1', $this->data);
}
So trying to get value of $data inside graph1() in another class, for example:
$object = new Data();
print_r($object->data);
This gives me a blank output, how can i make the $data value have the database result set?
Before dumping your object data, call your graph method to actually get the data. i.e.
$object = new Data();
$object->graph1();
print_r($object->data);
You could also call graph1 from your constructor like:
public function __construct() {
parent::__construct();
$this->load->model('months');
$this->load->driver('cache');
$this->graph1();
}
That way you would be able to actually use:
$object = new Data();
print_r($object->data);
If this solves your problem, I suggest you should read up OOP concepts. Regards.
I will show the real solution that works with the web application and unit testing.
Change this on data controller to:
public function graph1() {
$this->data = $this->months->get_months();
$this->layout->view('graph1', $this->data);
}
To:
public function graph1() {
$this->data = $this->months->get_months();
$this->layout->view('graph1', $this->data);
return $this->data;
}
The return won't cause problems with the layout and views. And will return the correct data to the unit test:
public function testgraph1() {
$object = new Data();
$out = $object->graph1();
print_r($out);
$this->assertArrayHasKey('11', $out);
}
So the other answer is incorrect, and will cause issues with the layout when graph1() is called in the constructor. I don't need to read about OOP but would suggest the person who answered incorrectly to read about web applications and unit testing.
I am trying to initialize data in index function of controller, so that initialized data can be used in subsequent functions of controller. But the problem is data is not being displayed when I am trying to access it from other function. All of this is just to follow a sort of object oriented pattern.
Here is my code.
class Dashboard extends CI_Controller
{
private $account_data; /*Declaration*/
private $profile_data;
function __construct() {
// code...
}
function index() /*Here I am initializing data*/
{
$this->load->model('db_model');
$this->account_data = $this->db_model->get_row();
$this->profile_data = $this->db_model->get_row();
$this->load->view('user/dashboard');
}
function function account_details()
{
print_r($this->account_data); // This displays nothing
}
/*other function...*/
}
Idea is to get data once and use it for other functions and if data is updated again calls a function to initialize it.
But it is not working out. Please help me. Also suggest if I am following right approach.
Thanks for your time.
index method is not initializer, its default page/sub_method,
if you call the "*account_details*" in url as index.php/dashboard/account_details the index wont be called.
try put the code on constructor,
class Dashboard extends CI_Controller
{
private $account_data; /*Declaration*/
private $profile_data;
function __construct() { /*Here I am initializing data*/
parent::CI_Controller(); // Thank you Sven
$this->load->model('db_model');
$this->account_data = $this->db_model->get_row();
$this->profile_data = $this->db_model->get_row();
}
function index()
{
$this->load->view('user/dashboard');
}
function function account_details()
{
print_r($this->account_data); // This displays nothing
}
/*other function...*/
}
Note : don't the models or other computations on __construct() if you don't need on all methods of this controller.
create a private method like "model_initializer()" put this codes on this scope, and the call it in your other methos as $this->model_initialize(); if you need.
Thanks yo Sesama Sesame for note,
I am developing a stats site in Codeigniter locally. I have a url like localhost/sitename/player/show_profile/PlayerName
I currently have the following:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Player extends CI_Controller
{
public function __construct()
{
parent::__construct();
$this->load->model('player_model');
$player_name = $this->uri->segment(3);
}
public function index()
{
echo "index";
}
public function show_profile($player_name)
{
$data['player_stats'] = $this->player_model->get_stats( $player_name );
$this->load->view('player/player_stats', $data);
}
}
?>
This works, but my question is regarding the $player_name variable. I have $player_name = $this->uri->segment(3); in the __construct so it's available to all of the class methods. Is this the way I should be doing it?
Is this safe?
Fist of all, there is no point in assigning the variable in the constructor because it's going to get overwritten. When you pass CI a url like localhost/sitename/player/show_profile/PlayerName, anything passed the method (i.e. PlayerName) get's set as the parameters. Therefore, your variable in
public function show_profile($player_name){
is already set when you get to your method code.
Secondly, I agree with Peter's:
protected $player_name;
for making it globally accessible in the controller. BUT, I don't agree with setting it in the constructor. If you have another method in this controller that passes a variable in that spot, you're going to get the wrong data in there. Set it in the method you called:
public function show_profile($player_name){
$this->player_name = $player_name;
$data['player_stats'] = $this->player_model->get_stats( $player_name );
$this->load->view('player/player_stats', $data);
}
What you could do is define a class variable called $player_name and in the constructor set this to segment(3).
class Player extends CI_Controller
{
protected $player_name;
public function __construct() {
parent::__construct();
$this->load->model( 'player_model' );
$this->player_name = $this->uri->segment( 3 );
}
public function index() {
echo "index";
}
public function ( show_profile ) {
$data['player_stats'] = $this->player_model->get_stats( $this->player_name );
$this->load->view( 'player/player_stats', $data );
}
}
This way will be able to access the $play_name variable anywhere in the class.
You could also check to see if it's set using the $this->uri->uri_to_assoc(n) method and check to see if the key/value isset() http://codeigniter.com/user_guide/libraries/uri.html.
Peter