: This article mainly introduces the use of interfaces for php Development. For more information about PHP tutorials, see. Inheritance simplifies the creation of objects and classes, and adds code reusability. However, php only supports single inheritance. to implement multiple inheritance, you must use multiple interfaces.
The interface is declared by using the interface keyword, and the class can only contain unimplemented methods and some member variables. the format is as follows:
Interface interfaceName {
Function interfaceName1 ();
Function interfaceName2 ();
...
}
Subclasses use the implements keyword to implement interfaces. to implement multiple interfaces, use commas (,) to connect each interface. All unimplemented methods must be implemented in the subclass; otherwise, php will fail. The format is as follows:
Class SubClass implments interfaceName1, interfaceName2 {
Function interfaceName1 (){
// Function implementation
}
Function interfaceName2 (){
// Function implementation
}
}
The sample code is as follows:
"; Echo" Mike is an ios coder
";}Functionbb () {echo" Jack is a java coder ";}}$ jack = new Am (); $ bluce = new Bm (); $ jack-> Aa (); echo"
"; $ Bluce-> Aa (); $ bluce-> Bb ();?>
The running result is as follows:
