javascript：

/*

时间转换成秒

*/

function time_to_second(time){

var arr = time.split(‘:‘)

var hour = arr[0]?arr[0]:0

var minute = arr[1]?arr[1]:0

var second = arr[2]?arr[2]:0

var ret = hour * 3600 + minute * 60 + second

return ret

}

/*

秒转换成时间

*/

function second_to_time(seconds){

hour = Math.floor(seconds / 3600)

minute = Math.floor((seconds - hour * 3600) / 60)

second = seconds - hour * 3600 - minute * 60

if(hour < 10){

hour = "0" + hour

}

if(minute < 10){

minute = "0" + minute

}

if(second < 10){

second = "0" + second

}

ret = hour + ‘:‘ + minute + ‘:‘ + second

return ret

}

// var time = "10:00:00"

// var ret = time_to_second(time)

// console.log(ret)

var seconds = 36000

var ret = second_to_time(seconds)

console.log(ret)

php：

/*

时间转换成秒

*/

function time_to_second($time){

if(!$time){

$ret = 0;

}else{

$parsed = date_parse($time);

$ret = $parsed[‘hour‘] * 3600 + $parsed[‘minute‘] * 60 + $parsed[‘second‘];

}

return $ret;

}

/*

秒转换成时间

*/

function second_to_time($seconds){

$hour = floor($seconds / 3600);

$minute = floor(($seconds - $hour * 3600) / 60);

$second = $seconds - $hour * 3600 - $minute * 60;

if($hour < 10){

$hour = "0{$hour}";

}

if($minute < 10){

$minute = "0{$minute}";

}

if($second < 10){

$second = "0{$second}";

}

$ret = "{$hour}:{$minute}:{$second}";

return $ret;

}

// $time = "01:00:00";

// $ret = time_to_second($time);

// echo $ret;

$seconds = 3600;

$ret = second_to_time($seconds);

echo $ret;

原文：http://blog.51cto.com/12173069/2294025