Question

标准功能（请参阅codepad）

<?php

$start_time_o = "18:00";
$end_time_o = date("H:i");

function get_time_difference(){

    global $start_time_o, $end_time_o;

    $start_time = explode(":", $start_time_o);
    $end_time = explode(":", $end_time_o);

    $start_time_stamp = mktime($start_time[0], $start_time[1], 0, 0, 0, 0);
    $end_time_stamp = mktime($end_time[0], $end_time[1], 0, 0, 0, 0);

    $time_difference = $end_time_stamp - $start_time_stamp;

    return gmdate("H:i", $time_difference); 
}

echo get_time_difference();

?>

修改后的功能（请参阅codepad）

<?php

$start_time_o = "18:00:01";
$end_time_o = date("H:i:s");

function get_time_difference(){

    global $start_time_o, $end_time_o;

    $start_time = explode(":", $start_time_o);
    $end_time = explode(":", $end_time_o);

    $start_time_stamp = mktime($start_time[0], $start_time[1], $start_time[2], 0, 0, 0, 0);
    $end_time_stamp = mktime($end_time[0], $end_time[1], $end_time[2], 0, 0, 0, 0);

    $time_difference = $end_time_stamp - $start_time_stamp;

    return gmdate("H:i:s", $time_difference); 
}

echo get_time_difference();

?>

第一个功能没有任何错误或通知。

修改后的函数给出了消息：

Deprecated: mktime(): The is_dst parameter is deprecated in C:\xampp\htdocs\index.php on line 13
Deprecated: mktime(): The is_dst parameter is deprecated in C:\xampp\htdocs\index.php on line 14

我不知道为什么我只在修改过的功能中收到消息？这里有什么不对？

Answer 1

如果您想使用更简单的方法，请尝试使用DateTime::diff

<?php
$datetime1 = new DateTime('18:00:01');
$datetime2 = new DateTime();
$interval = $datetime1->diff($datetime2);
echo $interval->format('H:i:s');
?>

这是一个可以让您更容易使用的功能：

<?php
function diff($first_datetime, $second_datetime = "now")
{
    $datetime1 = new DateTime($first_datetime);
    $datetime2 = new DateTime($second_datetime);
    $interval = $datetime1->diff($datetime2);
    return $interval->format('H:i:s');
}

// One of the date/time parameters is now so 
// we only  have to pass one parameter
echo diff('18:00:01');

// Neither parameter is now
echo diff('18:00:01', '20:00:00');
?>

Answer 2

使用strtotime

像

$someString = '10/10/2012 4:34 pm';  
date_default_timezone_set('American/New_York');
$timestamp = strtotime($someString);
echo date('Y/m/d H:i:s', $timestamp);

Answer 3

您在mktime()函数上使用了太多参数。删除其中一个零，如下所示：

$start_time_stamp = mktime($start_time[0], $start_time[1], $start_time[2], 0, 0, 0);
$end_time_stamp = mktime($end_time[0], $end_time[1], $end_time[2], 0, 0, 0);

这是导致你的问题的原因，但正如@NullPointer在他的回答中指出的那样，有一种更有效，更好的方法来实现这一目标。使用他的解决方案！

不推荐使用：mktime（）：不推荐使用is_dst参数

3 个答案: