<?php

abstract class Eat

{

abstract public function eat($food);

public function breath()

{

echo 'Breathing'.'<br />';

}

}

class Human extends Eat

{

public function eat($food)

{

echo 'Human eat'.$food.'<br />';

}

}

class Animal extends Eat

{

public function eat($food)

{

echo 'Animal eat'.$food.'<br />';

}

}

$monkey = new Animal();

$monkey->eat('apple');

?>

Fatal error: Cannot call abstract method Eat::eat() in D:\xampp\htdocs\oop\abstrct.class.php on line 25