PHP - extended __construct

Question

I was wondering if you could help me out..

I have two classes, one extends the other.. Class B will be extended by various different objects and used for common database interactions.. Now I would like class B to handle its connect and disconnects without direction from class A or any external input..

The problem from what I understand is that an extended class won't automatically run its __construct function.. Is there a way around this?

Thanks in advance..

class a extends b {    public function __construct()    {    }        public function validateStuff()    {       $this->insert_record();    } }  class b {    public function __construct()    {       $this->connect();    }     protected function connect()    {       return true;    }     public function insert_record()    {       return true;    } } 

Answer 1

The parent __construct() method defined in class b will run automatically if you instantiate child class a, unless there is a __construct() method defined in class a.

class a extends b {  }   class b {     public function __construct()     {        echo 'In B Constructor';     }  }   $x = new a(); 

If a __construct() method is defined in class a, then this overrides the use of the __construct() method in class b.... it will run instead of the class b __construct() method

class a extends b {     public function __construct()     {        echo 'In A Constructor';     }  }   class b {     public function __construct()     {        echo 'In B Constructor';     }  }   $x = new a(); 

So if your child class has a __construct() method defined, then you need to explicitly call the constructor for the parent if you want to execute that as well.

class a extends b {     public function __construct()     {        parent::__construct();       echo 'In A Constructor';     }  }   class b {     public function __construct()     {        echo 'In B Constructor';     }  }   $x = new a();