Instance in php

A single object created from a class definition is called Instance.Objects will be created by useing new keyword

<?php
Class Person{
}
$person1 =new Person;//1st instance
$person2 =new Person;//2nd instance

?>

Functions for Instance:

1. get_class($object):-returns Class name of object
2. is_a($object,$string):- checks matching object with string

File:class_instance.php

<?php
class Student{
}
$student1=new Student;
$student2=new Student;

echo get_class($student1).'<br>';
$class_names=['Teacher','Student','student'];
foreach($clas_names as $class_name){
  if(is_a($student1,$class_name))
  {
   echo "student1  is a {$class_name}.<br>";
  }
  else
  {
   echo "student1  is not a {$class_name}.<br>";
  }
}
?>

 Output:

Student
student1 is not a Teacher
student1 is a Student
student1 is a Student