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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; } } 
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PHP - The __construct FunctionA constructor allows you to initialize an object's properties upon creation of the object. If you create a __construct() function, PHP will automatically call this function when you create an object from a class. Notice that the construct function starts with two underscores (__)!
Example# __construct() is the most common magic method in PHP, because it is used to set up a class when it is initialized. The opposite of the __construct() method is the __destruct() method. This method is called when there are no more references to an object that you created or when you force its deletion.
Note: PHP lacks support for declaring multiple constructors of different numbers of parameters for a class unlike languages such as Java.
We can do this by using the special function call parent::__construct(). The "parent" part means "get the parent of this object, and use it", and the __construct() part means "call the construct function", of course. So the whole line means "get the parent of this object then call its constructor".
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(); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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