在__construct中创建的PHP对象在同一类的函数内部不可用

Question

PHP website developed using MVC pattern. i want access an object created using constructor in all functions of class. when i check is_object its not there so i create object one more time.

When try to simulate the MVC pattern its working fine( below code ) getting Object Accessible: $this->ldap Logged In! . But in my actual website getting as Non-Object: $this->ldap Logged In!

What could be possible mistakes i done? is there anyway to find what is the issue?

class ldap{
    function ldap_userAuth(){
        return TRUE;
    }
}

class commonfunctions {
    private $ldap;
    public function __construct(){
        $this->ldap=new ldap();
    }
    function userLogin(){
        if(!is_object($this->ldap)){
            $this->ldap=new ldap();
            echo 'Non-Object: $this->ldap'.PHP_EOL;
        }
        else{ 
            echo 'Object Accessible: $this->ldap'.PHP_EOL; 
        }
        if($this->ldap->ldap_userAuth()){
            return TRUE;
        }
        else{ 
            return FALSE; 
        }
    }
}

class Model extends commonfunctions {
}

class Controller {
    public $model;

    public function __construct(){  
        $this->model = new Model(); 
    }

    public function invoke(){
        if($this->model->userLogin()){
            echo 'Logged In!'.PHP_EOL;
        }
        else{ 
            echo 'Logged Out!'.PHP_EOL; 
        }
    }
}

$controller = new Controller();
$controller->invoke();

Note:- classes are included in the above order for my actual website. Above Code snippet is working as expected i have issue only in live website.

Answer 1

Try calling the __construct method of the parent in the Model class like this:

class Model extends commonfunctions {
    public function __construct(){
        parent::__construct();
    }
}

to make sure that the constructor is being called.