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<?php function is_valid_date($date) { if (preg_match('/^((19|20)\\d\\d)-(0?[1-9]|1[012])-(0?[1-9]|[12][0-9]|3[01]) ([01]\d|2[0123]):([0-5]\d):([0-5]\d)$/', $date, $matches)){ return checkdate($matches[3], $matches[4], $matches[1]); } return false; } var_dump(is_valid_date("2011-02-29 15:30:00")); //true ?>

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