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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

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Question about converting time

Posted by Par5n2 (Par5n2), 21 May 2003
I have a Perl script that was written a while ago and it is useful but the problem is that I would like all th times to dispatcy in GMT format. I am not a programmer as this was given to us by someone that is gone from the company. This is nothing but a display status for tickets we work. I was wondering if there is something that can run nested within the script to convert all times to GMT without changing the time on the server.

Posted by admin (Graham Ellis), 21 May 2003
Internally,  Perl handles times in seconds from 1st January 1970, and there are convertor functions that will take a time in seconds from 1.1.1970 and return a list of the elements of the time (seconds, minutes, hours, days, months, years ...) either in GMT or in the time for the same timezone that the computer is running in.

If you're lucky, you should be able to change some "localtime" calls to "gmtime" calls in the script and then Perl will do the conversion for you.  Not sure about "nesting" things - I can think of some ideas for various kludges but if a nice simple replace-one-function-by- another works, that would be much cleaner.

Posted by Par5n2 (Par5n2), 22 May 2003
Thank you very much SIR...

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