选择具有相同foriegn键的所有数据

Question

大家好，我在使用相同的外键选择数据库中的所有数据时遇到问题。但是这个代码在简单的php和html表中运行，但如果我在FPDF中调用该变量，它只显示带有外键的1行。我想显示所有数据取决于分配的外键

$queryDrinfo = "select * from drinfo";
$resultDrinfo = $mysqli->query($queryDrinfo)
while($rowDrinfo = $resultDrinfo->fetch_assoc()){
    $id = $rowDrinfo['id'];
    $drnum = $rowDrinfo['drnum'];

    $queryItems = "select * from items where drinfo_id=".$rowDrinfo['id'];
    $resultItems = $mysqli->query($queryItems);
    while($rowItems = $resultItems->fetch_assoc()){

        $itemnum = $rowItems['itemnum'];
        $description = $rowItems['description'];
        $qty = $rowItems['qty']; 
        $unit = $rowItems['unit'];
        $remarks = $rowItems['remarks'];

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(57.5);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$id,0);

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(57.5);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$drnum,0);

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(1);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$drinfo_id,0); 

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(51);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$itemnum,0); 

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(55);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$description,0);

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(58);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$qty,0); 

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(62);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$unit,0);

        $pdf->SetFont('Arial','',10);
        $pdf->SetY(66);
        $pdf->SetX(50);
        $pdf->Cell(20,6,$remarks,0);