PHP | ReflectionParameter isDefaultValueAvailable() Function

<?php

// Initializing a user-defined class Company1
class Company1
{
    function GFG($Full_Name = 'GeeksforGeeks'){}
}
 
// Initializing a subclass Company2
class Company2 extends Company1
{
}
 
// Using the ReflectionParameter over the above class
$A = new ReflectionParameter(['Company2', 'GFG'], 0); 
 
// Calling the isDefaultValueAvailable() function
$B = $A->isDefaultValueAvailable();
 
// Getting TRUE if a default value is available,
// otherwise FALSE
var_dump($B);
?>

<?php
 
// Initializing some user-defined classes
class Department1
{
    function HR( $Full_Name = 'Human Resource'){}
}
class Department2
{
    function Coding( $Parameter2, $Parameter3){}
}
class Department3
{
    function Marketing( $Parameter4, $Parameter5, $Parameter6){}
}
 
// Using the ReflectionParameter over the above classes
$A = new ReflectionParameter(['Department1', 'HR'], 0);
$B = new ReflectionParameter(['Department2', 'Coding'], 1);
$C = new ReflectionParameter(['Department3', 'Marketing'], 2);
 
// Calling the isDefaultValueAvailable() function and 
// getting TRUE if a default value is available, 
// otherwise FALSE
var_dump($A->isDefaultValueAvailable());
var_dump($B->isDefaultValueAvailable());
var_dump($C->isDefaultValueAvailable());
?>