Can $this be Used Outside Class (PHP)

<?phpclass MyClass {  private $say = 'I didn\'t say anything!';  public function say(string $text) {    $this->say = $text;  }  public function hear() {    require __DIR__ . '/test.php';    echo $this->say;  }}$MyClass = new MyClass();$MyClass->hear();?>

<?php$this->say('I Said Using $this Outside Class Is Possible!');?>