php实现求相对时间函数

本文实例讲述了php实现求相对时间函数。分享给大家供大家参考。具体实现方法如下：

<?phpfunction relativeTime($time = false, $limit = 86400, $format = "g:i A M jS") {  if (empty($time) || (!is_string($time) & amp; & amp;  !is_numeric($time))) $time = time();  elseif (is_string($time)) $time = strtotime($time);  $now = time();  $relative = "";  if ($time === $now) $relative = "now";  elseif ($time > $now) $relative = "in the future";  else {    $diff = $now - $time;    if ($diff >= $limit) $relative = date($format, $time);    elseif ($diff < 60) {      $relative = "less than one minute ago";    } elseif (($minutes = ceil($diff / 60)) < 60) {      $relative = $minutes . " minute" . (((int)$minutes === 1) ? "" : "s") . " ago";    } else {      $hours = ceil($diff / 3600);      $relative = "about " . $hours . " hour" . (((int)$hours === 1) ? "" : "s") . " ago";    }  }  return $relative;}

希望本文所述对大家的php程序设计有所帮助。