Interface In PHP

• An interface is similar to a class except that it cannot contain code.
• An interface can define method names and arguments, but not the contents of the methods.
• Any classes implementing an interface must implement all methods defined by the interface.
• A class can implement multiple interfaces.
• An interface is declared using the "interface" keyword.
• Interfaces can't maintain Non-abstract methods.

Example 1

1. <?php  
2.     interface a  
3.     {  
4.         public function dis1();  
5.     }  
6.     interface b  
7.     {  
8.         public function dis2();  
9.     }  
10.   
11. class demo implements a,b  
12. {  
13.     public function dis1()  
14.     {  
15.         echo "method 1...";  
16.     }  
17.     public function dis2()  
18.     {  
19.         echo "method2...";  
20.     }  
21. }  
22. $obj= new demo();  
23. $obj->dis1();  
24. $obj->dis2();  
25.   
26. ?>  

 

Example 2

1. <?php  
2.     interface i1  
3.     {  
4.         public function fun1();  
5.     }  
6.     interface i2  
7.     {  
8.         public function fun2();  
9.     }  
10. class cls1 implements i1,i2  
11. {  
12.     function fun1()  
13.     {  
14.         echo "javatpoint";  
15.     }  
16.     function fun2()  
17.     {  
18.         echo "SSSIT";  
19.     }  
20. }  
21. $obj= new cls1();  
22. $obj->fun1();  
23. $obj->fun2();  
24.   
25. ?>