PHP | ReflectionProperty isPrivate() Function

<?php

// Initializing a user-defined class Company
class Company
{
    private $SizeOfGeeksforGeeks = 13;
    public $SizeOfGFG = 3;
}

// Using ReflectionProperty 
$A = new ReflectionProperty('Company', 'SizeOfGeeksforGeeks');
$B = new ReflectionProperty('Company', 'SizeOfGFG');

// Calling the isPrivate() function
$C = $A->isPrivate();
$D = $B->isPrivate();

// Getting TRUE if the specified property
// is private, FALSE otherwise.
var_dump($C);
var_dump($D);
?>

<?php

// Initializing some user-defined classes
class Department1
{
    protected $SizeOfHR;
}
class Department2
{
    public $SizeOfCoding = 6;
}
class Department3
{
    private $SizeOfMarketing = 9;
}

// Using ReflectionProperty over above classes
$A = new ReflectionProperty('Department1', 'SizeOfHR');
$B = new ReflectionProperty('Department2', 'SizeOfCoding');
$C = new ReflectionProperty('Department3', 'SizeOfMarketing');

// Calling the isPrivate() function and
// getting TRUE if the specified property
// is private, FALSE otherwise.
var_dump($A->isPrivate());
var_dump($B->isPrivate());
var_dump($C->isPrivate());
?>