PHP oops - $this Keyword

$this keyword is used to access current properties and methods in a class. $this is used to point the current object of class in php.

We can also use $this to call one member function of a class inside another member function.

$this keyword is used to access non-static members of the class.

PHP Syntax:

$this->variable_name;
$this->method_name;

PHP Example :

<?php
// code by aryatechno!
class Tutorials
{
     public $name;
     function get_topic()
     {
         return $this->name;
     }
     function set_topic($name)
     {
         $this->name = $name;
     }
}

$topic = new Tutorials();

$topic->set_topic("How to Learn this Keyword");
echo "Topic is ".$topic->get_topic();
?>

Output:

Topic is How to Learn this Keyword

Explaination : As above example, $this keyword is used to assign and  retrive the value of $name variable of class Tutorials; $this keyword is used to point current object of class Tutorials. We can access all properties of class Tutorials using $this keyword inside class Tutorials.