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<?php $dates = array ('24-12-2013', '25-12-2013', '26-12-2014', '27-12-2013'); $start = strtotime('25-12-2013'); $end = strtotime('26-12-2013'); $inDateRange = count( array_filter( $dates, function($value) use($start, $end) { $value = strtotime($value); return ($value >= $start && $value <= $end); } ) ); var_dump($inDateRange);

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