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;
}
}
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();