PHP strtotime and JavaScript Date.parse return different timestamps

Question

I am getting same date time seconds value in JavaScript which is given by strtotime() in PHP. But i need same value in JavaScript.

PHP Code

echo strtotime("2011-01-26 13:51:50");
// 1296046310

JavaScript Code

var d = Date.parse("2011-01-26 13:51:50");
console.log(d);
// 1296030110000

Solution 1

You need to use the same time-zone for a sane comparison:

echo strtotime("2011-01-26 13:51:50 GMT");
// 1296049910

var d = Date.parse("2011-01-26 13:51:50 GMT") / 1000;
console.log(d);
// 1296049910

Update

According to the standard, only RFC 2822 formatted dates are well supported:

Date.parse("Wed, 26 Jan 2011 13:51:50 +0000") / 1000

To generate such a date, you can use gmdate('r') in PHP:

echo gmdate('r', 1296049910);

Solution 2

JavaScript uses milliseconds as a timestamp, whereas PHP uses seconds. As a result, you get very different dates, as it is off by a factor 1000.

sample

echo date('Y-m-d', TIMESTAMP / 1000);

Comment Response

<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">

    function toTimestamp(year,month,day,hour,minute,second)
    {
        var datum = new Date(Date.UTC(year,month-1,day,hour,minute,second));
        return datum.getTime()/1000;
    }

    $(function()
    {
        console.log(toTimestamp(2011,01,26,13,51,50));

    });

</script>

<?php

echo $the_date = strtotime("2011-01-26 13:51:50");

Solution 3

strtotime() and Date.parse() yield UNIX timestamps with a resolution of seconds and milliseconds respectively. However, if timezone information is missing from the input string, local time is assumed. So the input string 2011-01-26T13:51:50 may produce different output on different machines even if PHP (or JavaScript) is used to generate the timestamps on both machines.

The solution is to explicitly specify the timezone in the strings. This should produce the same result on any machine:

Date.parse("Jan 26, 2011 13:51:50 GMT+0500") / 1000; // 1296031910
strtotime("Jan 26, 2011 13:51:50 GMT+0500");         // 1296031910

Comments

[Ja͢ck]

That's not the only difference :)

[Dipesh Parmar]

@jack i know TIMEZONE also does matter but i just give second difference because first was already given by you

[Chinmay235]

Coming NaN in Mozilla browser.