Protected, Private and Public classes – The Difference

PHP5 allows developers to create public , private and protected methods and properties. They can be defined as :-

Protected:- The specified class and subclasses of that class can use the methods of that class

protected class Test
{
 $dead = false;

 function human()
 {
 }

 function set($dead)
 {
  $this->dead = "true";
 }

}

Public:- The specified class can only use the methods of that class no subclasses can modify the contents of that class

public class Test
{
 $dead = false;

 function human()
 {
 }

 function set($dead)
 {
  $this->dead = "true";
 }

}

Private:- The specified class can use the methods of that class, No Subclasses can use any method of that classes !

private class Test
{
 $dead = false;

 function human()
 {
 }

 function set($dead)
 {
  $this->dead = "true";
 }

}

It’s a good idea to mark functions and classes as protected , This can future proof the code because no method can change the value outside from the class thus reducing the number of hacking attempts.