PHP INTERFACES
- Interfaces allow you to specify what methods a class should implement.
- Interfaces make it easy to use a variety of different classes in the same way.
- When one or more classes use the same interface, it is referred to as "polymorphism".
- Interfaces are declared with the interface keyword
- Interfaces allow you to specify what methods a class should implement.
FOUR MAIN USER OF INTERFACE IN PHP :
- Graphical user interface
- Command line interface
- Menu-driven user interface
- Touchscreen Graphical User Interface.
EXAMPLES OF INTERFACES IN PHP :
- Computer mouse.
- Remote control.
- Virtual reality.
- ATMs.
- Speedometer.
- The old iPod click wheel.
SYNTAX FOR INHERITANCE IN PHP :
interface <interface_name>
{
// declare constant fields
// declare methods that abstract // by default.
}
EXAMPLE FOR INTERFACES IN PHP :
<?php
interface Animal {
public function make Sound ( ) ;
}
class Cat implements Animal {
public function make Sound ( ) {
echo "Meow";
}
}
$animal = new Cat ( ) ;
$animal->make Sound ( ) ;
?>
OUTPUT :
Meow
