$col_article = intval( $col_article );
$col_name = intval( $col_name );
if($col_article == 0) {
$col_article = "";
}
if($col_name == 0) {
$col_name = "";
}
foreach(['col_article', 'col_name'] as $field) {
$$field = (int) $$field;
if($$field === 0) $$field = '';
}
$sql = "SELECT searchArticle and brand from `dk_prices` where searchArticle = ?s and brand = ?s";
$result = $db->query($sql, $articleSearch, $brand);
if(mysqli_num_rows($result) > 0) {
$sql = "UPDATE `dk_prices` SET ?u WHERE searchArticle = ?s and brand = ?s";
INSERT INTO dk_prices SET ?u ON DUPLICATE KEY UPDATE ...