The ReflectionClass::implementsInterface() function is an inbuilt function in PHP which is used to check the specified interface is present or not.
Syntax:
bool ReflectionClass::implementsInterface( string $interface )
Parameters: This function accepts a single parameter $interface which holds the specified interface which are being checked.
Return Value: This function returns true on success or false on failure.
Below programs illustrate the ReflectionClass::implementsInterface() function in PHP:
Program 1:
<?php   // Defining some interfaces interface Colleges { } interface Departments { } interface Students { } interface Companies { }   // Initialising a class of Interfaces class Interfaces implements Colleges,         Departments, Students, Companies { }   // Using ReflectionClass over the class Interfaces $A = new ReflectionClass("Interfaces");   // Calling the implementsInterface() function // over the Interface 'Colleges' $B = $A->implementsInterface('Colleges');   // Getting the value true or false var_dump($B); ?> |
Output:
bool(true)
Program 2:
<?php    // Defining a SuperClass interface Company interface Company {     public function GFG(); }   // Defining a different interface Company1 interface Company1 {     public function neveropen(); }   // Defining a subclass Departments class Departments implements Company {     public function GFG() {} }   // Using ReflectionClass() over the // subclass Departments $reflect = new ReflectionClass('Departments');   // Calling implementsInterface() function $A = $reflect->implementsInterface('Company1');   // Getting the value either true or false var_dump($A);   ?> |
Output:
bool(false)
Reference: https://www.php.net/manual/en/reflectionclass.implementsinterface.php
