Compare Javascript date with php current date

Question

I am using the function :

var date = new Date();

in javascript. it gives the following output

"Sat May 13 2017 22:19:25 GMT+0500 (Pakistan Standard Time)"

Now I will embed this date in a URL and on server side , I will receive this date. On server i have a php script , now in this script i want to compare the date received from javascript client side with current php time and check if the difference between date time zone sent from javascript client side and current php date time zone is greater than 5 minutes or not .

i also have date time stamp with zone in millisecond in javascript like this....."1494688862301".....so how can i compare this in php ? — Shayan Arif
– Shayan Arif, Commented May 13, 2017 at 17:36
@YasharAliabasi , yes time is important.....i need to check if 5 minutes have passed since the user clicked on the link......so in php script i need to check if 5 minutes have passed , then i will expire the link — Shayan Arif
– Shayan Arif, Commented May 13, 2017 at 17:38

abeyaz · Accepted Answer · 2017-05-14 16:25:24Z

1

You should use timestamp comparison.

JS:

var timestamp = (new Date()).getTime(); // send this to your php

PHP:

$timestampFromJs = intval($_GET["ts"]); // just made it up
$ts = time() * 1000; // js timestamp is milliseconds
if($ts - $timestampFromJs > 5000*60) ...

UPDATE: If you need timezone safe comparison:

JS:

var timestamp = (new Date()).getTime();

PHP:

$timestampFromJs = intval($_GET["ts"]); // just made it up
$date_utc = new \DateTime("now", new \DateTimeZone("UTC"));
$ts = $date_utc->getTimestamp() * 1000; // js timestamp is milliseconds
if($ts - $timestampFromJs > 5000*60) ...

edited May 14, 2017 at 16:25

answered May 13, 2017 at 17:38

abeyaz

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6 Comments

Shayan Arif Over a year ago

does this also compare timezones?

abeyaz Over a year ago

I added timezone check now.

splash58 Over a year ago

I always thought that timestamp - seconds for Greenwich. Am I wrong?

abeyaz Over a year ago

Thats true. GMT = UTC

RobG Over a year ago

The "timezone safe" version is not timezone safe. The first version (which uses UTC) is.

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