PHP：格式化时间Stackoverflow或Apple Mail样式

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这个really nice function from the php.net documentation可让您以Facebook风格的方式(例如2分钟前,4周前或3年前)格式化时间.

但是,我更喜欢Stackoverflow和Apple Mail这样做的方式,通常如下：

>当前日期以x秒前或x小时前或时间(例如4:35 pm)列出.
>昨天被列为“昨天”.
>之后的所有天数按M / D / Y列出.

是否有人修改了这个php.net脚本来执行此操作,或者可能共享一个实现相同目标的脚本？

<?php 

  function nicetime($date)
 {
    if(empty($date)) {
      return "No date provided";
    }

$periods         = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
$lengths         = array("60","60","24","7","4.35","12","10");

$now             = time();
$unix_date         = strtotime($date);

   // check validity of date
if(empty($unix_date)) {    
    return "Bad date";
}

// is it future date or past date
if($now > $unix_date) {    
    $difference     = $now - $unix_date;
    $tense         = "ago";

} else {
    $difference     = $unix_date - $now;
    $tense         = "from now";
}

for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {
    $difference /= $lengths[$j];
}

$difference = round($difference);

if($difference != 1) {
    $periods[$j].= "s";
}

  return "$difference $periods[$j] {$tense}";
}

$date = "2009-03-04 17:45";
$result = nicetime($date); // 2 days ago

?>

解决方法:

好吧,我回答了我自己的问题.

关键是跟踪for循环经过多少轮除法,直到当前时间的商减去输入时间$difference除以$lengths数组项的$jth值小于$j的$j 1th值为止.这个数组.

我通过在此nicetime()的修改版本中增加变量$i(注意if / elseif / else子句展示了我上面提到的3个点中的每一个)来跟踪此操作：

     ///http://php.net/manual/en/function.time.php
  function nicetime($date)
 {
    if(empty($date)) {
      return "No date provided";
    }

$periods         = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
$lengths         = array("60","60","24","7","4.35","12","10");

$now             = time();
$unix_date         = strtotime($date);

   // check validity of date
if(empty($unix_date)) {    
    return "Bad date";
}

// is it future date or past date
if($now > $unix_date) {    
    $difference     = $now - $unix_date;
    $tense         = "ago";

} else {
    $difference     = $unix_date - $now;
    $tense         = "from now";
}
$i=0;
for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {
    $i++;
    $difference /= $lengths[$j];
}

$difference = round($difference);

if($difference != 1) {
    $periods[$j].= "s";
}

if($i<3){
    $day="$difference $periods[$j] {$tense}";
    return $day;
    //satisfies case #1 where time is listed as seconds, minutes, hours ago
}

elseif($i==3){
    $difference == 1 && $periods[$j]=='day' ? $day='yesterday':     
    $day="$difference $periods[$j] {$tense}";
    return $day;        
    //satisfies case #2 where time is listed as yesterday if not the current day

}
else{
    return $date;       
    // satisfies case #3 where date is listed as M/D/Y if greater than a week old
}   

}

echo "case#1: ".nicetime('2012-08-13 23:12:16');
echo "case#2: ".nicetime('2012-08-12 23:12:16');
echo "case#3: ".nicetime('2012-07-07 23:12:16');

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