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：
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<?php
function 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;
}
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希望本文所述对大家的php程序设计有所帮助。