array_push

    <?php
   

    $filename = "config.php";

                        if(!file_exists($filename)){ echo('404 conf Not found');  die;  }
                        include $filename;
    $dataPoints = array();

    $solar = array("solar");

       $record = mysqli_query($con, "SELECT ablesedatum, kwh FROM solar ORDER BY ablesedatum DESC LIMIT 10";)

         //       if (count($record) == 0 ) { echo "nix"; }

          $rowcount = mysqli_num_rows( $record );
       echo "anz".  $rowcount;

    while($row = mysqli_fetch_array($record))

    {
 >>> hier der ev. Fehler        array_push($dataPoints, array("x" => $row['ablesedatum', "y" => $row['kwh']));

//array_push($dataPoints, $daten);


}

   foreach($dataPoints as $element) {
      echo '<br>'.$element;

 }
      

    ?>