PHP时区冲突

Question

I have set my date.timezone setting in my php.ini directory as follows

date.timezone = "Asia/Kolkata"

When I run mktime using following parameters

mktime(0,0,0,10,11,1993);

The timestamp i get is 752907600

But when i precede the mktime function with date_default_timezone_set('Asia/Kolkata'); it gives me the expected output timestamp i.e. 752869800

If both the timezones are same then why is the output different?

----------------EDIT--------------------------

Ok I got the problem, but I dont know why is it occuring

echo date_default_timezone_get().'<br />';
echo mktime(0,0,0,11,10,1993).'<br />';
date_default_timezone_set('Asia/Kolkata');
echo date_default_timezone_get().'<br />';
echo mktime(0,0,0,11,10,1993);

output

EST5EDT
752907600
Asia/Kolkata
752869800

I have set the .ini settings correctly then what may be the problem?

Answer 1

Ok I got the problem, but I dont know why is it occuring

Like you already see in your code, it is timezone issue. mktime and strtotime functions are timezone/offset aware. Function time() on other hand is not influenced by timezone offset.

If you need mktime() that will always return GMT/UTC date, you can use gmmktime().