Using time() and setTime() functions in PHP and javascript

Question

I would like to have a javascript date object having its time set according to the web server.

<script type="text/javascript">

var date=new Date();

date.setTime(<?php echo time() ?>);

alert(date.toString()); //displays the date and time according to the timezone set on the client's computer

</script>

Is the above code reliable?

Many thanks to you all.

Reliable in what respect? It's likely to be off a second or two sometimes if a response takes a lot of time, but other than that... it should be okay — Pekka
– Pekka, Commented Feb 15, 2011 at 12:54
@ajreal: Thanks for suggesting NTP. My web app is not a critical one, it's just for fun, so it should be fine. — bobo
– bobo, Commented Feb 15, 2011 at 18:44

Community · Accepted Answer · 2023-11-17 19:42:58Z

4

I think it's not.

Since Javascript's setTime() works with milliseconds and PHP's time() works with seconds.

You'll need to add some stuff to make it works ;) I'll let you find out what.

edited Nov 17, 2023 at 19:42

CommunityBot

11 silver badge

answered Feb 15, 2011 at 13:04

Shikiryu

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4 Comments

user447356 Over a year ago

So won't date.setTime(<?php echo time() ?> * 1000) suffice to solve this difference?

Shikiryu Over a year ago

Seriously? You don't want to make the OP thinks by himself or you just like spoon-feeding? Anyway, as @Pekka said, it won't be reliable because of response time.

bobo Over a year ago

It's just some unit conversion so the spoon is not really a big one. Thank you so much for pointing out the error in my code :)

user447356 Over a year ago

more like giving all the help possible but I can see your point. Sometimes those trivial things take hours for newbies to figure out so I prefer to save them those hours.

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