A.php

<?php
class A
{
    public function printItem($string)
    {
        echo ' Hi : ' . $string; 
    }
    
    public function printPHP()
    {
        echo 'I am from valuebound' . PHP_EOL;
    }
}

class B extends A
{
    public function printItem($string)
    {
        echo 'Hi: ' . $string . PHP_EOL;
    }
 public function printPHP()
    {
        echo "I am from ABC";
    }
}

$a = new A();
$b = new B();
$a->printItem('Raju');
$a->printPHP();       
$b->printItem('savan'); 
$b->printPHP();       
?>