php 如何检查当前日期/时间是否超过了设定的日期/时间？

How can I check if the current date/time is past a set date/time?

提问by dave

I'm trying to write a script that will check if the current date/time is past the 05/15/2010 at 4PM

我正在尝试编写一个脚本来检查当前日期/时间是否超过 05/15/2010 at 4PM

How can I use PHP's date() function to perform this check?

如何使用 PHP 的 date() 函数来执行此检查？

回答by Salman A

Since PHP >= 5.2.2 you can use the DateTimeclass as such:

由于 PHP >= 5.2.2 你可以这样使用这个DateTime类：

if (new DateTime() > new DateTime("2010-05-15 16:00:00")) {
    # current time is greater than 2010-05-15 16:00:00
    # in other words, 2010-05-15 16:00:00 has passed
}

The string passed to the DateTime constructoris parsed according to these rules.

根据这些规则解析传递给DateTime 构造函数的字符串。

---

---

Note that it is also possible to use timeand strtotimefunctions. See original answer.

请注意，也可以使用time和strtotime函数。请参阅原始答案。

回答by VolkerK

There's also the DateTimeclass which implements a function for comparison operators.

还有DateTime类，它实现了比较运算符的功能。

// $now = new DateTime();
$dtA = new DateTime('05/14/2010 3:00PM');
$dtB = new DateTime('05/14/2010 4:00PM');

if ( $dtA > $dtB ) {
  echo 'dtA > dtB';
}
else {
  echo 'dtA <= dtB';
}

回答by Select0r

Check PHP's strtotime-function to convert your set date/time to a timestamp: http://php.net/manual/en/function.strtotime.php

检查 PHP 的strtotime-function 将您设置的日期/时间转换为时间戳：http: //php.net/manual/en/function.strtotime.php

If strtotimecan't handle your date/time format correctly ("4:00PM" will probably work but not "at 4PM"), you'll need to use string-functions, e.g. substrto parse/correct your format and retrieve your timestamp through another function, e.g. mktime.

如果strtotime无法正确处理您的日期/时间格式（“4:00PM”可能会起作用，但不会“在 4PM”），您将需要使用字符串函数，例如substr解析/更正您的格式并通过以下方式检索您的时间戳另一个功能，例如mktime。

Then compare the resulting timestamp with the current date/time (if ($calulated_timestamp > time()) { /* date in the future */ }) to see whether the set date/time is in the past or the future.

然后将生成的时间戳与当前日期/时间 ( if ($calulated_timestamp > time()) { /* date in the future */ }) 进行比较，以查看设置的日期/时间是过去还是将来。

I suggest to read the PHP-doc on date/time-functions and get back here with some of your source-code once you get stuck.

我建议阅读有关日期/时间函数的 PHP 文档，并在遇到问题时返回此处提供一些源代码。

回答by Rakesh Kumar Pradhan

date_default_timezone_set('Asia/Kolkata');

$curDateTime = date("Y-m-d H:i:s");
$myDate = date("Y-m-d H:i:s", strtotime("2018-06-26 16:15:33"));
if($myDate < $curDateTime){
    echo "active";exit;
}else{
    echo "inactive";exit;
}