Source Code : Using the extends keyword to define a subclass

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Using the extends keyword to define a subclass

 
<?php
class Cat {
    var $age;

    function Cat($new_age){
        $this->age = $new_age;
    }
    function Birthday(  ){

        $this->age++;
    }
}
class MyCat extends Cat {
    function MyCat(  ) {
    }
    function sleep(  ) {
        echo("Zzzzzz.<br />");
    }
}
$fluffy=new MyCat(  );
$fluffy->Birthday(  );
$fluffy->sleep(  );
echo "Age is $fluffy->age <br />";
?>
  
  

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