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<?php $string = "2014-10-10,2689,100.20,99.33,2613 2014-10-13,2628,101.10,99.98,2741 2014-10-14,2741,100.06,99.20,2658 2014-10-15,2741,100.06,99.20,2658"; $date = array_reduce(explode(' ', $string), function($carry, $item) { $carry[] = explode(',', $item)[0]; return $carry; }); var_dump($date);

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