**PHP倒计时函数、求两个日期时间之间相差的时间函数、计算时差函数_PHP函数笔记**

```php

/**

* 求两个日期时间之间相差的时间

* (针对1970年1月1日之后，求之前可以采用泰勒公式)

* @param string $day1 2016-10-01 10:01:08

* @param string $day2 2020-10-01 10:01:08

* @return list

*/

function diffBetweenTwoDate($start_time, $end_time){

$start = strtotime($start_time);

$stop = strtotime($end_time);

if($start < $stop){

$total_days = ($stop-$start) / 86400;

$result['total_days'] = intval($total_days);

$result['year'] = 0;

$result['month'] = 0;

if($total_days < 7){//如果小于7天直接返回天数

$result['day'] = intval($total_days);

}elseif($total_days <= 31){//小于28天则返回周数，由于闰年2月满足了

if($stop == strtotime($start_time.'+1 month')){

$result['month'] = 1;

}else{

//$w = floor($total_days / 7);

//$d = ($stop - strtotime($start_time.'+'.$w.' week')) / 86400;

//$result['week'] = $w;

//$result['day'] = intval($d);

$result['day'] = intval($total_days);

}

}else{

$y= floor($total_days / 365);

if($y >= 1){//如果超过一年

$start = strtotime($start_time.'+'.$y.'year');

$start_time = date('Y-m-d',$start);

//判断是否真的已经有了一年了，如果没有的话就开减

if($start>$stop){

$start_time = date('Y-m-d',strtotime($start_time.'-1 month'));

$m = 11;

$y--;

}

$total_days = ($stop - strtotime($start_time)) / 86400;

}

if(isset($m)){

$w = floor($total_days / 7);

$d = $total_days-$w * 7;

}else{

$m = isset($m) ? $m : round($total_days / 30);

$stop >= strtotime($start_time.'+'.$m.'month') ? $m : $m--;

if($stop >= strtotime($start_time.'+'.$m.'month')){

$d = $w = ($stop-strtotime($start_time.'+'.$m.'month')) / 86400;

//$w = floor($w / 7);

//$d = $d - $w * 7;

}

}

$result['year'] = $y;

$result['month'] = $m;

//$result['week'] = $w;

$result['day'] = intval(isset($d) ? $d : 0);

}

$result['hours'] = intval((($stop - $start) % 86400) / 3600);

$result['min'] = intval(((($stop - $start) % 86400) % 3600) / 60);

$result['sec'] = ((($stop - $start) % 86400) % 3600) % 60;

}else{

$result['total_days'] = 0;

$result['year'] = 0;

$result['month'] = 0;

$result['day'] = 0;

$result['hours'] = 0;

$result['min'] = 0;

$result['sec'] = 0;

}

//return array_filter($result);

return $result;

}

```

返回字段**年、月、日、时、分、秒**

最后更新于 2019-07-20 16:39:20 并被添加「倒计时 php函数笔记」标签，已有 14971 位童鞋阅读过。

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