title: In PHP, how can I get Timezone from offset and country?
body: <p>I am doing an IP lookup to determine a "best guess" for timezone offset from UTC and the country/region information. </p>
  
  <p>So, for instance, I have offset -3 and country Brazil.</p>
  
  <p>I want to show BRT instead of a random timezone in that same offset, i.e. ART</p>
  
  <p>Is there some built-in way in PHP to be able to set the appropriate timezone with this information?</p>
  
  <p>If not, what would be the easiest way to do this?
  (Assume that I can't make any outside API calls)</p>
  
  <p>If I do my own database table, how do I ensure it stays up to date?</p>
  
  <p>Thanks!</p>