In Magento2 I am trying to connect to an external database and table and use the data to update a custom product attribute where the sku' match in both tables. I temporarily put this code in my footer.phtml file as I am just trying. ti do a quick import/population of custom attributes from an external source

I am trying to do the below query. If I remove my query code and just card code a sku and a part id it updates Magento just fine so something about my sql it does not like. I confirmed my credentials are valid for accessing the database

$machine = "xxxxx";
$machineu = "xxxx";
$machinep = "xxx";
$machinedbname = "xxxx";

// Create connection
$conn = mysqli_connect($machine, $machineu, $machinep, $machinedbname);
if (!$conn) {
   die("Connection failed: " . mysqli_connect_error());

$testsql = mysqli_query($conn, "SELECT * FROM tempinfo");
while($row = mysqli_fetch_array($testsql))
  echo "<p style='color:#ffffff'>test $sku</p><br />";
  $_product = $objectManager->create('\Magento\Catalog\Api\ProductRepositoryInterface')->get($sku,true, 0, true);
  $_product->setCustomAttribute("part_id", "$part_id");

1 Answer 1


I am also using an external database to update some product infos, but I use PDO.

Maybe this helps:

     try {
             $conn = new \PDO("mysql:host=$servername;dbname=$dbname;port=$port", $username, $password);

             $selection="SELECT * from table WHERE id='$sku';
             foreach ($conn->query($selection) as $dbitem) {
               $_product->setCustomAttribute("part_id", $dbitem['part_id']);
      } catch(PDOException $e) {
        echo "Connection failed: " . $e->getMessage();
  • Thank you but no matter what I do my query does not seem to work in Magento.
    – Jayreis
    Nov 9, 2020 at 21:28
  • hmm...do you get any errors? Can you check, if there are any datasets in your table (maybe just echo "true" in the while-part)? are you sure, your credentials are correct and the table-name is correct?
    – Mario
    Nov 9, 2020 at 21:36

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