如何在 PHP 中從 Unix 時間戳記產生相對日期/時間字串？

<p>function time2str($ts)</p>{<p><br><br>}</p>

// Handle syntax variations
if(!ctype_digit($ts)) $ts = strtotime($ts);

// Calculate the difference between now and the timestamp
$diff = time() - $ts;

// Check for exact matches to simplify handling
if($diff == 0) return 'now';

// Handle past timestamps
if($diff > 0)
{
    // Calculate day difference
    $day_diff = floor($diff / 86400);

    // Format past time intervals
    switch(true)
    {
        case ($day_diff == 0):    return constructPastInterval($diff); // Hours, minutes, seconds
        case ($day_diff == 1):    return 'Yesterday';
        case ($day_diff < 7):    return $day_diff . ' days ago';
        case ($day_diff < 31):   return ceil($day_diff / 7) . ' weeks ago';
        case ($day_diff < 60):   return 'last month';
        default:               return date('F Y', $ts);
    }
}
// Handle future timestamps
else
{
    // Calculate absolute difference
    $diff = abs($diff);
    
    // Calculate day difference and format future time intervals based on logic similar to the past case.
}