PHP oops calling a method from another mehod of a class example

class Person

{
	
	public function function1()
	{
		return 'from function1';
	}


      public function function2()
	{
		$function1 = $this->function1();

		echo $function2 = $function1." from function2";
	}
	
}

$person = new Person();

$person->function2();

In the above example class Person have a function named function1.
 we want to call it inside another function named fnction2.
 function1 return a string. by using $this keyword we can access function from a class
 $function1 = $this->function1(); this line access function1 and store the returned
 string "from function1" into $function1 variable;