PHP protected Keyword

Example

Use protected to prevent outside code from modifying a property:

<?php

  class MyClass {
  protected $number = 0;
}

class
  AnotherClass extends MyClass {
  public function add1() {
   
  $this->number++;
  }

  public function getNumber() {
   
  return $this->number;
  }
}

$obj = new AnotherClass();

  $obj->add1();
echo "The number is " . $obj->getNumber();

?>

Definition and Usage

The protected keyword is an access modifier. It marks a property or method as protected.

Protected properties and methods can only be used by the class in which the property or method was defined and any classes that derive from it. Any other code cannot use them.

Related Pages

The private keyword

The public keyword