PHP 的 mktime , time format , 週編號 , week number of year, weeks starting on Monday

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Screenshot 2015 02 06 15 31 50

 

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52 - 2014-12-29 00:00:00
52 - 2014-12-30 00:00:00
52 - 2014-12-31 00:00:00
00 - 2015-01-01 00:00:00
00 - 2015-01-02 00:00:00
00 - 2015-01-03 00:00:00
00 - 2015-01-04 00:00:00
01 - 2015-01-05 00:00:00
01 - 2015-01-06 00:00:00
01 - 2015-01-07 00:00:00