The ReflectionClass::isSubclassOf() function is an inbuilt function in PHP which is used to check if any subclass is available or not.
Syntax:
bool ReflectionClass::isSubclassOf( $class )
Parameters: This function accepts a single parameter class which is the class name being checked against.
Return Value: This function returns TRUE if the subclass is available, otherwise FALSE.
Below programs illustrate the ReflectionClass::isSubclassOf() function in PHP:
Program 1:
<?php   // Initialising a user-defined superclass Company class Company {     public function neveropen() {} }   // Creating a subclass Departments class Departments extends Company {     public function HR_Department() {} }   // Using ReflectionClass() $subclass = new ReflectionClass('Departments');   // Calling the isSubclassOf() function $Result = $subclass->isSubclassOf('Company');   // Getting the value true or false var_dump($Result); ?> |
Output:
bool(true)
Program 2:
<?php   // Initialising a user-defined class Departments class Departments {     public function CSE() {} }   // Using ReflectionClass() over the // user-defined class Departments $subclass = new ReflectionClass('Departments');   // Calling the isSubclassOf() function $Result = $subclass->isSubclassOf('Departments');   // Getting the value true or false var_dump($Result); ?> |
Output:
bool(false)
Reference: https://www.php.net/manual/en/reflectionclass.issubclassof.php
