How can i list has same id data with while loop in PHP? [closed]

Answer 1

Order your results by series_id, so all the products with the same value will be together.

$stmt = $pdo->prepare("SELECT series_id, product_name
                       FROM yourTable
                       ORDER BY series_id");
$stmt->execute();

Then when displaying the results, show the Series header and start a new

whenever it changes:

$last_series = null;
echo "
\n";
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    if ($row['series_id'] != $last_series) {
        if ($last_series) {
            echo "
\n";
        }
        echo "
" . $row['series_id'] . " Series Product\n";
        echo "
\n";
        $last_series = $row['series_id'];
    }
    echo "
" . $row['product_name'] . "
\n";
}
if ($last_series) {
    echo "\n";
}
echo "
\n";