function human_time_diff( $from, $to = '' )
        {
            $chunks = array(
                array( 60 * 60 * 24 * 365 , '%s year', '%s years' ),
                array( 60 * 60 * 24 * 30 , '%s month', '%s months' ),
                array( 60 * 60 * 24 * 7, '%s week', '%s weeks' ),
                array( 60 * 60 * 24 , '%s day', '%s days' ),
                array( 60 * 60 , '%s hour', '%s hours' ),
                array( 60 , '%s minute', '%s minutes' ),
                array( 1 , '%s second', '%s seconds' ),
            );

            if ( empty( $to ) )
            		$to = time();

            $diff = (int) abs( $to - $from );


            for ( $i = 0, $j = count( $chunks ); $i < $j; $i++)
            {
                $seconds = $chunks[$i][0];
                $name1 = $chunks[$i][1];
                $name2 = $chunks[$i][2];

                if ( ( $count = floor( $diff / $seconds ) ) != 0)
                    break;
            }

            $since = sprintf( _n( $name1, $name2, $count ), $count );

            $i++;

            if ( $i < $j )
            {
                $seconds_p2 = $chunks[$i][0];
                $name1 = $chunks[$i][1];
                $name2 = $chunks[$i][2];

                if ( ( $count = floor( ( $diff - ( $seconds * $count ) ) / $seconds_p2 ) ) != 0 )
                {
                    if( is_rtl() )
                        $since = sprintf( _n( $name1, $name2, $count ), $count ) ." ". $since;
                    else
                        $since = $since. " " . sprintf( _n( $name1, $name2, $count ), $count );
                }
            }

            return $since;
        }