在脚本中设置系统日期? [英] Set system date in script?

问题描述

PHP是否提供一种在脚本中设置系统日期的方法?

Does PHP provide a way to set the system date within a script?

即这样我就可以使 date('Y')返回 1999 ，即使它当前是 2021 .

i.e. so that I can make date('Y') return 1999 even though it's currently 2021.

我希望能够快速设置系统日期以进行调试/测试.

I want to be able to quickly set the system date for debugging/testing purposes.

也许系统日期"是是错误的短语.我只希望它在运行时针对同一脚本进行更改.

Perhaps "system date" is the wrong phrase. I only want it to be changed for the same script, whilst it's running.

推荐答案

操纵测试的服务器日期会导致许多其他问题.不要这样做！

Manipulating the server date for a test creates a host of other problems. Don't do it!

您始终可以在脚本中将时间戳记用作第二个参数.使用strtotime()，您可以测试任何日期的脚本.

You can always use a timestamp as a second parameter in your script. With strtotime() you can test the script with any date.

$ts = time();
$ts = strtotime('1999-01-01');  
echo date('Y', $ts);  //1999

测试后，使用strtotime注释掉该行，然后使用time()初始化时间戳.然后，日期('Y')的行为就像没有第二个参数一样.

After the test, the line is commented out with strtotime and the time stamp is then initialized with time(). The date ('Y') then behaves like without a second parameter.

$ts = time();
//$ts = strtotime('1999-01-01');  
echo date('Y', $ts);  //2021

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