php - 用数字字符串计算时间(HH :MM:SS)

Question

我想知道在 PHP/Codeigniter 中是否可以减去时间格式为

的值

HH:MM:SS

例如:

$time1 = "12:45:03";
$time2 = "14:03:48";

$timelength = $time2- $time1;

有任何建议或指向代码示例的链接吗？

Answer 1

这就像

//function to convert seconds into hour:minute:second
function sec2hms ($sec, $padHours = false) 
{

    // start with a blank string
    $hms = "";

     // do the hours first: there are 3600 seconds in an hour, so if we divide
     // the total number of seconds by 3600 and throw away the remainder, we're
     // left with the number of hours in those seconds
     $hours = intval(intval($sec) / 3600); 

     // add hours to $hms (with a leading 0 if asked for)
     $hms .= ($padHours) 
     ? str_pad($hours, 2, "0", STR_PAD_LEFT). ":"
     : $hours. ":";

     // dividing the total seconds by 60 will give us the number of minutes
     // in total, but we're interested in *minutes past the hour* and to get
     // this, we have to divide by 60 again and then use the remainder
     $minutes = intval(($sec / 60) % 60); 

     // add minutes to $hms (with a leading 0 if needed)
     $hms .= str_pad($minutes, 2, "0", STR_PAD_LEFT). ":";

    // seconds past the minute are found by dividing the total number of seconds
    // by 60 and using the remainder
    $seconds = intval($sec % 60); 

    // add seconds to $hms (with a leading 0 if needed)
    $hms .= str_pad($seconds, 2, "0", STR_PAD_LEFT);

   // done!
   return $hms;

 }

$subtracted_time = strtotime($time2) - strtotime($time1); //gives difference in seconds
echo(sec2hms($subtracted_time));

函数 sec2hms 来源 http://www.laughing-buddha.net/php/lib/sec2hms/