[PHP基础]PHP，日期时间与秒数的相互转换

// 设置时区
date_default_timezone_set("Asia/Shanghai");

// 首先取得当前的日期和时间
$date_time = date("Y-n-j-G-i-s");
$date_time_seconds = date("U");
echo "当前日期为：".$date_time;
echo "<br />";
echo "当前日期的秒数为：".strval($date_time_seconds);
echo "<br />";



function DatetimeToSeconds($date_time) {
    $result = array();
    $result = split("-", $date_time);
    $year = $result[0];
    $month = $result[1];
    $day = $result[2];
    $hour = $result[3];
    $minite = $result[4];
    $second = $result[5];

    // 开始计算
    $seconds = mktime($hour, $minite, $second, $month, $day, $year);

    return $seconds;
}

function SecondsToDatetime($date_time_seconds) {
    $result = date("Y-n-j-G-i-s", $date_time_seconds);
    return $result;
}


$date_time2 = SecondsToDatetime($date_time_seconds);
$date_time_seconds2 = DatetimeToSeconds($date_time);
echo "当前日期为：".$date_time2;
echo "<br />";
echo "当前日期的秒数为：".strval($date_time_seconds2);
echo "<br />";