public function getPreviousChunk()
	{
		$offset = --$this->index * $this->size;
		
		if ($offset >= 0) {
			$chunk = $this->getChunk($offset);
		} else {
			$chunk = false;
		}
		
		return $chunk;
	}
public function getPreviousChunk()
	{
		$offset = --$this->index * $this->size;
		
		if ($offset >= 0) {
			$chunk = $this->getChunk($offset);
		} else {
			$chunk = false;
		}
		
		return $chunk;
	}
public function getPreviousChunk ( ) { $ offset = -- $ this -> index * $ this -> size ; if ( $ offset >= 0 ) { $ chunk = $ this -> getChunk ( $ offset ) ; } else { $ chunk = false ; } return $ chunk ; }
Returns the previous chunk and updates the chunker's internal pointer

@return  int
@since  0.1.0
Returns the previous chunk and updates the chunker s internal pointer