this.php

<?php

class This {

	protected $this;

	public function __construct () 
	{
		$this->this = $this;
	}

	public function this ()
	{
		return $this->this->this->this->hi();
	}
	
	public function hi() {
	{	
		return 'hello';
	}
}

echo (new This())->this();