original_string: public function get_caption($key = 0)
  	{
  		$captions = $this->get_captions();
  		if (isset($captions[$key]))
  		{
  			return $captions[$key];
  		}
  		else
  		{
  			return null;
  		}
  	}
code: public function get_caption($key = 0)
  	{
  		$captions = $this->get_captions();
  		if (isset($captions[$key]))
  		{
  			return $captions[$key];
  		}
  		else
  		{
  			return null;
  		}
  	}
code_tokens: public function get_caption ( $ key = 0 ) { $ captions = $ this -> get_captions ( ) ; if ( isset ( $ captions [ $ key ] ) ) { return $ captions [ $ key ] ; } else { return null ; } }
docstring: Get a single caption
  
  @param int $key
  @return SimplePie_Caption|null
docstring_tokens: Get a single caption