Loop timer with PHP - php

Question

I have a WEBVTT file connect with a video, the video length is about 120 minutes. The thumbnail tooptips of the video is running every second, which mean 120*60=7200 secs.
How to convert 7200 secs to WEBVTT format(hh:mm:ss.ttt) with php loop function? Example:
00:00:00.000 --> 00:00:01.000
00:00:01.000 --> 00:00:02.000
00:00:02.000 --> 00:00:03.000
00:00:03.000 --> 00:00:04.000
and so on...
Thanks!

Answer 1

Using date():
date_default_timezone_set('UTC'); // To fix some timezone problems
$start = 0; // 0h
$end = 7200; // 2h
$output = '';
for($i=$start;$i<$end;$i++){
$output .= date('H:i:s', $i).'.000 --> '.date('H:i:s', $i+1).'.000'.PHP_EOL;
}
echo $output;
Note that if $limit reaches 86400 it will start from 0 again.

Answer 2

I don't think PHP is the right tool here. Sounds like Javascript is probably what you're after if you want to display this on the screen for your users.
For PHP, you can use the date function
function secondsToWebvtt($seconds) {
//set the time to midnight (the actual date part is inconsequential)
$time = mktime(0,0,0,1,2,2012);
//add the number of seconds
$time+= $seconds;
//return the time in hh:mm:ss.000 format
return date("H:i:s.000",$time);
}
With Javascript, I would use a function like this
var seconds = 0;
function toTime() {
var time = new Date("1/1/2012 0:00:00");
var newSeconds = time.getSeconds() + seconds;
var strSeconds = newSeconds + "";
if(strSeconds.length < 2) { strSeconds = "0" + strSeconds; }
var hours = time.getHours() + "";
if(hours.length < 2) { hours = "0" + hours; }
var minutes = time.getMinutes() + "";
if(minutes.length < 2) { minutes = "0" + minutes; }
var dispTime = hours + ":" + minutes + ":" + strSeconds + ".000";
return dispTime;
}
function getTime() {
var time = toTime(seconds);
//do something with time here, like displaying on the page somewhere.
seconds++;
}
And then use setInterval to call the function
setInterval("getTime",1000);