Php constructor Inheritance method, php constructor Inheritance _php Tutorial

Php constructor Inheritance method, PHP constructor inheritance

This article describes the inheritance method of PHP constructors. Share to everyone for your reference. Specific as follows:

The first case: When a subclass does not have a constructor defined, it inherits by default. Example:

<?phpclass a{public $name; function __construct () {echo $this->name= "Xiao Qiang";}} Class B extends a{} $bb = new B ();? >

Output result: Xiao Qiang

The second case: The subclass defines the constructor and is not inherited. Example:

<?phpclass a{public $name; function __construct () {echo $this->name= "Xiao Qiang";}} Class B extends a{function __construct () {echo "bbbbbb subclass";}} $BB = new B ();? >

Output Result: bbbbbb sub-class

The third case: if you need to call the constructor of the parent class, you can use: Parent:: Parents or parent class Name:: Parent class function.

I hope this article is helpful to everyone's PHP programming.

http://www.bkjia.com/PHPjc/955400.html www.bkjia.com true http://www.bkjia.com/PHPjc/955400.html techarticle The inheritance method of Php constructor, the PHP constructor inherits the example of Php constructor. Share to everyone for your reference. As follows: First case: Subclass ...

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