Introduction

An object is a collection of strings, variables and functions belonging to one entity, usually derived from a class

class ninja
{
 $health = 100;
 $strength = 10
 function attack($enemy,$strength,$health)
 {
     if ($enemy->strength > $strength)
     {
       health = health -10;
       return $health;
     }
  }
}

$red_ninja   = new ninja; // red_ninja is one object
$black_ninja = new ninja; // black_ninja is one object
// turn 1
$red_ninja->attack($black_ninja);// red_ninja gets first go and attcks black_ninja
// turn 2
$black_ninja->attack($red_ninja);// black_ninja gets second go and attacks red_ninja