Description:
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the problem is:

in sunday code output date for Monday next week

$date = new DateTime();
$date->setTimezone(new DateTimeZone('Europe/Moscow'));
$date->setTimestamp(strtotime('Monday this week'));

echo $date->format("d.m.Y"); 

but in other days (except Sunday) its return correct value of Monday.

I ever set locale manualy , which has a monday - the first day of week, but PHP "think" the Sunday is still firs day. is it bug ?? or i do some wrong ?

for check this you need to set you local time in any Sunday.

Test script:
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$date = new DateTime();
$date->setTimezone(new DateTimeZone('Europe/Moscow'));
$date->setTimestamp(strtotime('Monday this week'));

echo $date->format("d.m.Y");

Expected result:
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The value on this week Monday.

for example in Sunday of 10.02.2012 i expect to see 04.02.2012. 



Actual result:
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if i test this code at Sunday 10.02.2012 - actual result is 11.02.2012 

- it's wrong because this is a next week