PHP的将datetime转换为带有时区的unixtime

Question

我有Asia / Karachi的日期时间2017-10-11 09:40:42我想将其转换为Unix时间戳。

注意：我有多个时区不同的记录，例如：澳大利亚/悉尼

我无法从以下代码转换为

function unixTimefromTime($thetime='now',$timezone){
    if(is_numeric($thetime)){
        $dt = new \DateTime('@'.$thetime);
        $dt->setTimeZone(new \DateTimeZone($timezone));
        return $dt->getTimestamp();
    } else {
        $date = new \DateTime($thetime, new \DateTimeZone($timezone));
        return $date->getTimestamp();
    }
}

unixTimefromTime('2017-10-11 09:40:42','Asia/Karachi');

Answer 1

function DateTimeToUnixFromTimezone($dateNTime,$timezone){
    $date = new DateTime($dateNTime, new DateTimeZone($timezone));
    return $date->getTimestamp() + $date->getOffset();
}