PHP - How To Access Class Member ?

I have mysqli object in Database class base:

[color=]database class:[/color]

class Database {
  private $dbLink = null;
  
  public function __construct() {
    if (is_null($this->dbLink)) {
      // load db information  to connect
      $init_array = parse_ini_file("../init.ini.inc", true);
      $this->dbLink = new mysqli($init_array['database']['host'],
                           $init_array['database']['usr'],
                           $init_array['database']['pwd'],
                           $init_array['database']['db']);
  
      if (mysqli_connect_errno()) {
        $this->dbLink = null;
      }
    }
  }

  public function __destruct() {
    $this->dbLink->close();
  }
}


Class derived is Articles where I use object dBLink in base (or parent) class and I can't access to mysqli methods (dbLink member of base class):

Articles class:

require_once ('./includes/db.inc');

class Articles extends Database{
  private $id,
              ....
              ....
             $visible = null;
  
  public function __construct() {
    // Set date as 2009-07-08 07:35:00
    $this->lastUpdDate = date('Y-m-d H:i:s');
    $this->creationDate = date('Y-m-d H:i:s');
  }
  
  // Setter
  ....
  ....

  // Getter
  ....
  ....

  public function getArticlesByPosition($numArticles) {
    if ($result = $this->dbLink->query('SELECT * FROM articles ORDER BY position LIMIT '.$numArticles)) {
      $i = 0;
      while ($ret = $result->fetch_array(MYSQLI_ASSOC)) {
        $arts[$i] = $ret;
      }
      $result->close();
      return $arts;
    }
  }
}


In my front page php I use article class:


include_once('./includes/articles.inc');
$articlesObj = new articles();
$articles = $articlesObj->getArticlesByPosition(1);
var_dump($articles);


[color=]Error that go out is follow[/color]

Notice: Undefined property: Articles::$dbLink in articles.inc  on line 89

Fatal error: Call to a member function query() on a non-object in articles.inc on line 89

If I remove constructor on derived class Articles result don't change 
Please help me

I have the following simple class:

Code: [Select]
class Settings {
  public static $mysql_datetime_format = "%c/%e/%Y %l:%i %p " . date("[T]");
}

And referencing like:

Code: [Select]
echo Settings::$mysql_datetime_format;

But, I am getting the error: Parse error: syntax error, unexpected '.', expecting ',' or ';'.

Why is this invalid?

HI everyone!

So basically I have this class called Login and another class classed Reports. They both extend a main class called OOP. I'm trying to get classes now and in the future, when I add on, to access that class so that way I dont have to create a new object everytime I need to do that. Plus I know I dont want to rely on calling another class inside of one class.

Here is an example

The Super Class

class OOP{
public function Login($pointer){
$Login->{$pointer}();
}

public function Reports($pointer){
$Reports->{$pointer}()
}
}


Login Class

class Login extends OOP{
public function userLogin($user, $pass){
//Login code here
//if error occurs, send it to Reports
super::Reports(Error());
}
}


Reports Class

class Reports extends OOP{
public function Error(){
//Send an error here
}
}


Here is how I think I would call the class if a user was to login.

$OOP = new OOP();

$OOP->Login(userLogin($user, $pass));


So now when I need to call any class I should be able to, correct?


If you are confused about the top, then think of it this way:
I am trying to create a class to where I can call or reference to ANY object now or in the future so I can add on and call that class from another class.


Thank you for any help.

Hi,
when i extend a class containing a private variable and then access the variable in the extended class it doesn't produce any error and works fine and when i access the variable using the object of the extended class it works even then, i think private variable should not be accessable in an extended class neither by object of that extended class
here is the code


<?php

class textbox{

var $body_text, $body_text1;

private $body_private="this is private value";

protected $body_protect="this is protected value";

function __construct($text_in, $text_out){

$this->body_text=$text_in;

$this->body_text1=$text_out;

}

function display(){

echo "$this->body_text<br>";

echo "<i>";

echo "$this->body_text1</i><br>";

echo "$this->body_private<br/>";

echo "$this->body_protect<br/>";

}

function test_new(){

echo "see if this private echo works";

}

}

$box=new textbox("any new value","any old value" );

$box->display();

$box->body_text="this is public thats why i can access it";

$box->body_text1="this is public thats why i can access it";

/*$box->body_private="this is private value changed";   //you will see we can't access the private and protected memebers from outside

$box->body_protect="this is protected value changed"; */

$box->display();

$box->test_new();



class textboxbold extends textbox{

function __construct($text_on, $text_off, $text_get, $text_go)

{$this->body_text=$text_on;

$this->body_text1=$text_off;

$this->body_protect=$text_get;

$this->body_private=$text_go;

}

function display(){

echo "<b>$this->body_text</b><br>";

echo "<b>$this->body_text1</b><br>";

echo "<b>$this->body_protect</b><br>";

echo "<i>$this->body_private</i><br>";

}

}

$boxnew=new textboxbold("new Bold text", "text in bold","protected member","private");

$boxnew->display();

$boxnew->body_private="this is simple text taken from outside";

$boxnew->display();

$boxnew->test_new();

?>


please recommend, is it working as it should be

I have these two classes:
Code: [Select]
<?php
class A {
private $id;
public function __construct() {
$this->id = '11111';
}
public function getProperty($prop) {
return $this->$prop;
}
}?>
Code: [Select]
<?php
class B extends A {
private $message = "Nope, can't see it";
public function __construct() {
parent::__construct();
$this->message = "Yep, I can see it";
}
}?>
I tried this, but it just outputs the id (the first call)
Code: [Select]
$class = new B;
echo $class->getProperty('id');
echo $class->getProperty('message');
Why is that? I thought I could use a parent method on a child property..


*EDIT* Using a public or protected visibility on the message property gets me the output I expect...how come?