7.4、时间转换（将时分秒转换为秒）

/**
 * Function gettime
 * 时间转换（将时分秒转换为秒）
 * @param $n INT秒
 */
public function gettime($time){
    $explodetime1 = explode("时",$time);
    $time_shi=$explodetime1[0];
    $explodetime2 =explode("分",$explodetime1[1]);
    $time_fen=$explodetime2[0];
    $explodetime3 = explode("秒",$explodetime2[1]);
    $time_miao=$explodetime3[0];
    $timeallmiao = $time_shi*3600+$time_fen*60+$time_miao;
    return $timeallmiao;
}