<?php
class Person
{
      public function showData()
      {
            echo "This is Person's showData()n";
      }
}
?
class Customer extends Person
{
      public function showData()
      {
            parent::showData();  //Calling Person Class showData Method
            echo "This is Customer's showData()";
      }
}
?
$c = new Customer();
$c->showData();
?>