php支持的时区

php7支持的所有时区：

<?php
$timeZones = DateTimeZone::listIdentifiers();
// $timeZones = DateTimeZone::listIdentifiers(DateTimeZone::PER_COUNTRY, 'CN');
// $timeZones = DateTimeZone::listIdentifiers(DateTimeZone::AFRICA | DateTimeZone::AMERICA);
echo "<pre>";
print_r($timeZones);
echo "</pre>";
exit;
foreach ($timeZones as $key => $zoneName) {
    $tz = new DateTimeZone($zoneName);
    $loc = $tz->getLocation();
    print($zoneName . " = " . $loc['comments'] . "<br>");
}

临时设置时区：

//临时设置时区为用户时区
date_default_timezone_set($timezone);

参考资料：
​​​https://countrycode.org/philippines​​

​​https://www.ncbi.nlm.nih.gov/genbank/collab/country/​​

​​http://www.geonames.org/​​

​​https://timezonedb.com/time-zones​​

​​http://download.geonames.org/export/dump/​​

​​https://www.timeanddate.com/worldclock/uk/belfast​​