blocks|key|3333485|text|$myTimezone+=+date_default_timezone_get();
date_default_timezone_set($userTimezone);
$userDay+=+date('l',+$userTimestamp);
date_default_timezone_set($myTimezone);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3333486|这应该可以工作(没有测试，所以YMMV)。它的工作方式是存储脚本的当前时区，将其更改为用户指定的时区，在指定的时间戳从date()函数获取星期几，然后将脚本的时区设置回最初的时区。|unstyled|offset|length|style|CODE|3333487|不过，您可能会在使用时区标识符方面遇到一些困难。|3333488|entityMap^0|0|1N|6|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@$G|Q|H|R|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>$myTimezone = date_default_timezone_get();
date_default_timezone_set($userTimezone);
$userDay = date('l', $userTimestamp);
date_default_timezone_set($myTimezone);
</code></pre>

This should work (didn't test it, so YMMV). It works by storing the script's current timezone, changing it to the one specified by the user, getting the day of the week from the <code>date()</code> function at the specified timestamp, and then setting the script's timezone back to what it was to begin with.

You might have some adventures with timezone identifiers, though.

blocks|key|345304|text|如果你可以得到他们的时区偏移量，你可以将它添加到当前的时间戳中，然后使用gmdate函数来获得他们的本地时间。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|345305|//+let's+say+they're+in+the+timezone+GMT%2B10
$theirOffset+=+10;++//+$_GET['offset']+perhaps?
$offsetSeconds+=+$theirOffset+*+3600;
echo+gmdate("l",+time()+%2B+$offsetSeconds);|code-block|syntax|javascript|345306|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/gmdate^0|10|6|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

If you can get their timezone offset, you can just add it to the current timestamp and then use the <a href="http://php.net/gmdate" rel="noreferrer">gmdate</a> function to get their local time.

<pre><code>// let's say they're in the timezone GMT+10
$theirOffset = 10; // $_GET['offset'] perhaps?
$offsetSeconds = $theirOffset * 3600;
echo gmdate("l", time() + $offsetSeconds);
</code></pre>

blocks|key|345334|text|“星期几”实际上可以直接从php+date()函数中获得，格式分别为"l“或"N”。看一看the+manual|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|345335|编辑:抱歉，我没有正确阅读Kalium的帖子，他已经解释过了。是我的错。|345336|entityMap|0|LINK|mutability|MUTABLE|url|http://de2.php.net/manual/en/function.date.php^0|19|A|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

"Day of Week" is actually something you can get directly from the php date() function with the format "l" or "N" respectively. Have a look at 
<a href="http://de2.php.net/manual/en/function.date.php" rel="nofollow noreferrer">the manual</a>

edit: Sorry I didn't read the posts of Kalium properly, he already explained that. My bad.

blocks|key|348916|text|$dw+=+date(+"w",+$timestamp);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|348917|您可以在这里看到：http://www.php.net/manual/en/function.date.php，其中$dw将从0(周日)到6(周六)|unstyled|offset|length|348918|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/manual/en/function.date.php^0|0|9|1A|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@$G|S|H|T|1|U]]|A|$]]|$1|I|3|-4|5|F|7|V|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P]]]]

<pre><code>$dw = date( "w", $timestamp);
</code></pre>

Where $dw will be 0 (for Sunday) through 6 (for Saturday) as you can see here:
<a href="http://www.php.net/manual/en/function.date.php" rel="noreferrer">http://www.php.net/manual/en/function.date.php</a>

blocks|key|345361|text|非常感谢你们的快速评论。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|345362|这就是我现在要用到的。在这里发布函数，以便其他人可以使用它。|345363|public+function+getDayOfWeek($pTimezone)
{

++++$userDateTimeZone+=+new+DateTimeZone($pTimezone);
++++$UserDateTime+=+new+DateTime("now",+$userDateTimeZone);

++++$offsetSeconds+=+$UserDateTime->getOffset();+
++++//echo+$offsetSeconds;

++++return+gmdate("l",+time()+%2B+$offsetSeconds);

}|code-block|syntax|javascript|345364|如果您发现任何更正，请报告。|345365|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Thanks a lot guys for your quick comments.

This is what i will be using now.
Posting the function here so that somebody may use it.

<pre><code>public function getDayOfWeek($pTimezone)
{

 $userDateTimeZone = new DateTimeZone($pTimezone);
 $UserDateTime = new DateTime("now", $userDateTimeZone);

 $offsetSeconds = $UserDateTime-&gt;getOffset(); 
 //echo $offsetSeconds;

 return gmdate("l", time() + $offsetSeconds);

}
</code></pre>

Report if you find any corrections.

blocks|key|346314|text|另一种快速方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|346315|date_default_timezone_set($userTimezone);
echo+date("l");|code-block|syntax|javascript|346316|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Another quick way:

<pre><code>date_default_timezone_set($userTimezone);
echo date("l");
</code></pre>

blocks|key|3333673|text|我的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3333674|$tempDate+=+'2012-07-10';
echo+date('l',+strtotime(+$tempDate));|code-block|syntax|javascript|3333675|输出为：Tuesday|offset|length|style|CODE|3333676|$tempDate+=+'2012-07-10';
echo+date('D',+strtotime(+$tempDate));|3333677|输出为：Tue|3333678|entityMap^0|0|0|4|7|0|0|4|3|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@$I|V|J|W|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

My solution is this:

<pre><code>$tempDate = '2012-07-10';
echo date('l', strtotime( $tempDate));
</code></pre>

Output is: <code>Tuesday</code>

<pre><code>$tempDate = '2012-07-10';
echo date('D', strtotime( $tempDate));
</code></pre>

Output is: <code>Tue</code>

blocks|key|345404|text|检查日期是get之前的星期一或星期日或上个星期日|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|345405|+public+function+getWeek($date){
++++$date_stamp+=+strtotime(date('Y-m-d',+strtotime($date)));

+++++//check+date+is+sunday+or+monday
++++$stamp+=+date('l',+$date_stamp);++++++
++++$timestamp+=+strtotime($date);
++++//start+week
++++if(date('D',+$timestamp)+==+'Mon'){++++++++++++
++++++++$week_start+=+$date;
++++}else{
++++++++$week_start+=+date('Y-m-d',+strtotime('Last+Monday',+$date_stamp));
++++}
++++//end+week
++++if($stamp+==+'Sunday'){
++++++++$week_end+=+$date;
++++}else{
++++++++$week_end+=+date('Y-m-d',+strtotime('Next+Sunday',+$date_stamp));
++++}++++++++
++++return+array($week_start,+$week_end);
}|code-block|syntax|javascript|345406|entityMap^0|0|O|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Check date is monday or sunday before get last monday or last sunday 

<pre><code> public function getWeek($date){
 $date_stamp = strtotime(date('Y-m-d', strtotime($date)));

 //check date is sunday or monday
 $stamp = date('l', $date_stamp); 
 $timestamp = strtotime($date);
 //start week
 if(date('D', $timestamp) == 'Mon'){ 
 $week_start = $date;
 }else{
 $week_start = date('Y-m-d', strtotime('Last Monday', $date_stamp));
 }
 //end week
 if($stamp == 'Sunday'){
 $week_end = $date;
 }else{
 $week_end = date('Y-m-d', strtotime('Next Sunday', $date_stamp));
 } 
 return array($week_start, $week_end);
}
</code></pre>

blocks|key|348970|text|基于从周日或周一开始在周之间切换的具有标志的其他解决方案之一|type|unstyled|depth|inlineStyleRanges|entityRanges|data|348971|function+getWeekForDate($date,+$weekStartSunday+=+false){

++++$timestamp+=+strtotime($date);

++++//+Week+starts+on+Sunday
++++if($weekStartSunday){
++++++++$start+=+(date("D",+$timestamp)+==+'Sun')+?+date('Y-m-d',+$timestamp)+:+date('Y-m-d',+strtotime('Last+Sunday',+$timestamp));
++++++++$end+=+(date("D",+$timestamp)+==+'Sat')+?+date('Y-m-d',+$timestamp)+:+date('Y-m-d',+strtotime('Next+Saturday',+$timestamp));
++++}+else+{+//+Week+starts+on+Monday
++++++++$start+=+(date("D",+$timestamp)+==+'Mon')+?+date('Y-m-d',+$timestamp)+:+date('Y-m-d',+strtotime('Last+Monday',+$timestamp));
++++++++$end+=+(date("D",+$timestamp)+==+'Sun')+?+date('Y-m-d',+$timestamp)+:+date('Y-m-d',+strtotime('Next+Sunday',+$timestamp));
++++}

++++return+array('start'+=>+$start,+'end'+=>+$end);
}|code-block|syntax|javascript|348972|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Based on one of the other solutions with a flag to switch between weeks starting on Sunday or Monday

<pre><code>function getWeekForDate($date, $weekStartSunday = false){

 $timestamp = strtotime($date);

 // Week starts on Sunday
 if($weekStartSunday){
 $start = (date("D", $timestamp) == 'Sun') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Last Sunday', $timestamp));
 $end = (date("D", $timestamp) == 'Sat') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Next Saturday', $timestamp));
 } else { // Week starts on Monday
 $start = (date("D", $timestamp) == 'Mon') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Last Monday', $timestamp));
 $end = (date("D", $timestamp) == 'Sun') ? date('Y-m-d', $timestamp) : date('Y-m-d', strtotime('Next Sunday', $timestamp));
 }

 return array('start' =&gt; $start, 'end' =&gt; $end);
}
</code></pre>

blocks|key|345422|text|echo+date('l',+strtotime('today'));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|345423|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>echo date('l', strtotime('today'));
</code></pre>

blocks|key|348982|text|我认为这是正确的答案，只要将Europe/Stockholm更改为用户的时区即可。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|348983|$dateTime+=+new+\DateTime(
++++'now',
++++new+\DateTimeZone('Europe/Stockholm')
);
$day+=+$dateTime->format('N');|code-block|syntax|javascript|348984|PHP+8601星期几的数字表示形式(在|348985|+5.1.0中添加)1(表示星期一)到7(表示星期天)|blockquote|348986|348987|348988|http://php.net/manual/en/function.date.php|348989|有关支持的时区列表，请参见http://php.net/manual/en/timezones.php|348990|entityMap|0|LINK|mutability|MUTABLE|url|1|http://php.net/manual/en/timezones.php^0|E|G|0|0|0|0|0|0|0|16|0|0|D|12|1|0^^$0|@$1|2|3|4|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|18|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|19|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|1C|8|@]|D|@$9|1D|A|1E|1|1F]]|E|$]]|$1|T|3|U|5|6|7|1G|8|@]|D|@$9|1H|A|1I|1|1J]]|E|$]]|$1|V|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|W|$X|$5|Y|Z|10|E|$11|S]]|12|$5|Y|Z|10|E|$11|13]]]]

I think this is the correct answer, just change <code>Europe/Stockholm</code> to the users time-zone.

<pre><code>$dateTime = new \DateTime(
 'now',
 new \DateTimeZone('Europe/Stockholm')
);
$day = $dateTime-&gt;format('N');
</code></pre>

<blockquote>
 ISO-8601 numeric representation of the day of the week (added in PHP 5.1.0)
 1 (for Monday) through 7 (for Sunday)
</blockquote>

<a href="http://php.net/manual/en/function.date.php" rel="noreferrer">http://php.net/manual/en/function.date.php</a>

For a list of supported time-zones, see
<a href="http://php.net/manual/en/timezones.php" rel="noreferrer">http://php.net/manual/en/timezones.php</a>

blocks|key|344135|text|日期部分的基于字母的标准表示法很棒，除了它们不是很直观。更方便的方法是识别基本的抽象和一些具体的实现。此外，使用这种方法，您可以从自动完成中受益。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|344136|既然我们在这里讨论的是datetimes，那么它的基本抽象似乎就是ISO8601DateTime。其中一个具体的实现是current+datetime，当向您的后端发出请求时需要它，因此是Now()类。第二个对你有用的是调整到某个时区的datetime。毫不奇怪，它被称为AdjustedAccordingToTimeZone。最后，您需要在传递的datetime的时区中指定一周中的某一天:有一个LocalDayOfWeek类可以实现这一点。因此，代码如下所示：|offset|length|style|CODE|344137|(new+LocalDayOfWeek(
++++new+AdjustedAccordingToTimeZone(
++++++++new+Now(),
++++++++new+TimeZoneFromString($_POST['timezone'])
++++)
))
++++->value();|code-block|syntax|javascript|344138|有关此方法的更多信息，请访问take+a+look+here。|344139|entityMap|0|LINK|mutability|MUTABLE|url|https://meringue.readthedocs.io/en/latest/quick_start.html^0|0|X|F|2M|5|3S|R|5J|E|0|0|E|G|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]|$D|10|E|11|F|G]|$D|12|E|13|F|G]|$D|14|E|15|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|16|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|17|8|@]|9|@$D|18|E|19|1|1A]]|A|$]]|$1|O|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

Standard letter-based representations of date parts are great, except the fact they're not so intuitive. The much more convenient way is to identify basic abstractions and a number of specific implementations. Besides, with this approach, you can benefir from autocompletion.

Since we're talking about datetimes here, it seems plausible that the basic abstraction is <code>ISO8601DateTime</code>. One of the specific implementations is current datetime, the one you need when a makes a request to your backend, hence <code>Now()</code> class. Second one which is of some use for you is a datetime adjusted to some timezone. Not surprisingly, it's called <code>AdjustedAccordingToTimeZone</code>. And finally, you need a day of the week in a passed datetime's timezone: there is a <code>LocalDayOfWeek</code> class for that. So the code looks like the following:

<pre><code>(new LocalDayOfWeek(
 new AdjustedAccordingToTimeZone(
 new Now(),
 new TimeZoneFromString($_POST['timezone'])
 )
))
 -&gt;value();
</code></pre>

For more about this approach, <a href="https://meringue.readthedocs.io/en/latest/quick_start.html" rel="nofollow noreferrer">take a look here</a>.

I am confused while using php to handle date/time.

What I am trying to do is this: When a user visits my page I am asking his timezone and then displaying the 'day of week' in his timezone.

I don't want to use the browser's day.
I want to do this calculation in php.

This is how I am trying to achieve it:

<ol>
<li>The timezone entered by user</li>
<li>Unix time stamp calculated by php time() function.</li>
</ol>

But I dont know how to proceed...
How would i get the 'day of week' in this timezone.

How to find day of week in php in a specific timezone

Unix

在使用php处理日期/时间时，我感到困惑。我想要做的是:当用户访问我的页面时，我会询问他的时区，然后在他的时区中显示“星期几”。我不想用浏览器的日子。我想用php做这个计算。这就是我试图实现它的方式：用户输入的时区通过php ()函数计算出的Unix时间戳。但我不知道该怎么做。在这个时区，我如何获取“星期几”？

问如何在特定时区的php中查找星期几
EN

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问如何在特定时区的php中查找星期几
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