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<?php // http://gathering.tweakers.net/forum/list_messages/1644050 $date = new DateTime('2015-01-01'); // Volgens http://www.epochconverter.com/date-and-time/weeknumbers-by-year.php zou het nummer 1 moeten zijn. echo $date->format('W');

This is an error 500

Value for `_results` contains invalid data `array`


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