some PHP timeago code

smth.php

$time_elapsed = timeAgo($time_ago); //The argument $time_ago is in timestamp (Y-m-d H:i:s)format.
        
        //Function definition
        
        function timeAgo($time_ago)
        {
            $time_ago = strtotime($time_ago);
            $cur_time   = time();
            $time_elapsed   = $cur_time - $time_ago;
            $seconds    = $time_elapsed ;
            $minutes    = round($time_elapsed / 60 );
            $hours      = round($time_elapsed / 3600);
            $days       = round($time_elapsed / 86400 );
            $weeks      = round($time_elapsed / 604800);
            $months     = round($time_elapsed / 2600640 );
            $years      = round($time_elapsed / 31207680 );
            // Seconds
            if($seconds <= 60){
                return "just now";
            }
            //Minutes
            else if($minutes <=60){
                if($minutes==1){
                    return "one minute ago";
                }
                else{
                    return "$minutes minutes ago";
                }
            }
            //Hours
            else if($hours <=24){
                if($hours==1){
                    return "an hour ago";
                }else{
                    return "$hours hrs ago";
                }
            }
            //Days
            else if($days <= 7){
                if($days==1){
                    return "yesterday";
                }else{
                    return "$days days ago";
                }
            }
            //Weeks
            else if($weeks <= 4.3){
                if($weeks==1){
                    return "a week ago";
                }else{
                    return "$weeks weeks ago";
                }
            }
            //Months
            else if($months <=12){
                if($months==1){
                    return "a month ago";
                }else{
                    return "$months months ago";
                }
            }
            //Years
            else{
                if($years==1){
                    return "one year ago";
                }else{
                    return "$years years ago";
                }
            }
        }