How to convert time zone in PHP?

How to convert time zone in PHP?

First instantiate the "DateTimeZone" class, and the instantiation parameter is the time zone to be converted; then instantiate the "DateTime" class, whose parameter 1 is the time to be converted, and parameter 2 is the "DateTimeZone" object; Finally, call the format of the "DateTime" object.

Code sample

<?php
function changeTimeZone($date_time, $format = &#39;Y-m-d H:i:s&#39;, $to = &#39;Europe/Rome&#39;, $from = &#39;Asia/Shanghai&#39;) {
    $datetime = new DateTime($date_time, new DateTimeZone($from));
    $datetime->setTimezone(new DateTimeZone($to));
    return $datetime->format($format);
}
 
$time = changeTimeZone(&#39;2018-12-19 00:00:00&#39;);
$t = changeTimeZone(&#39;2018-12-19 00:00:00&#39;, &#39;Y-m-d&#39;);
echo $time;
echo $t;

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