Showing Warning on screen. How do I stop this?

[eluser]stowell48[/eluser]
Hi, I am trying to run my code locally, but I am getting a php warning error displayed instead of showing my page. Is this a setting that I change in codeigniter, or would this be a php setting?

Also, I get this warning when trying to use the libraries/Zip.php file. Is it possible to fix this warning so that it doesn't display this?

Thanks


A PHP Error was encountered

Severity: Warning

Message: substr() [function.substr]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Denver' for '-7.0/no DST' instead

Filename: libraries/Zip.php

Line Number: 161