javascript与php时/分/秒与秒数互转

/*
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)