- var_dump: documentation ( source)
- date_create: documentation ( source)
- timezone_open: documentation ( source)
- date_default_timezone_set: documentation ( source)
- date_format: documentation ( source)
- date_timezone_set: documentation ( source)
<?php
date_default_timezone_set("UTC");
$datetime = date_create("2020-07-13 10:38:15", timezone_open("+10:00"));
$datetime2 = clone $datetime;
$datetime3 = date_timezone_set( $datetime, timezone_open( "UTC" ) );
$utc = date_format( $datetime3, "Y-m-d H:i:s" );
$datetime = $datetime2;
$local = date_format( $datetime, "Y-m-d H:i:s" );
var_dump('Local date '.$local, 'UTC date '.$utc);