php - How do I create levels when making a table in HTML?

Example picture in linked Above! (only to show the functionality I'm after) Functionality: What I'm looking for is a view on my website where a detail will (if there is sub-details) be rendered as a in HTML and then in the for that I'd like to present the sub-details (and if the sub-detail has sub-details, id like to do the same to that) Now I'd like to be able to do this up to 5-6 times (levels deep). As the example-picture shows (not my website), the material has sub-material. The sub-material also has sub-materials.

I'm currently only at level 2 (detail (level 1) -> sub-detail (level 2). How do I iterate this?

Below is my current code (only the part where the table goes).

<table class="tabell">
    <tr>
      <th scope="col" style="visibility: hidden;">ID</th>
      <th scope="col">Articlenumber</th>
      <th scope="col">Description</th>
      <th scope="col">Weight Total(g)</th>
      <th scope="col">Amount</th>
      <th scope="col">Operations</th>
    </tr>
    <?php
    $sqlproduct= "SELECT DISTINCT
    mainarticle.mainArtNum,
    mainarticle.mainName,
    mainarticle.mainWeight,
    componentarticle.compID,
    componentarticle.compArtNum,
    componentarticle.compName,
    componentarticle.compWeight,
    maincontains.mainContainsQuantity,
    maincontains.mainContainsID
    FROM
    maincontains
    INNER JOIN mainarticle ON maincontains.mainContainsMainID = mainarticle.mainID
    INNER JOIN componentarticle ON maincontains.mainContainsCompID = componentarticle.compID
    WHERE maincontains.maincontainsmainid ='$id';";
    $result = mysqli_query($conn, $sqlproduct);
    if($result){
        while($row = mysqli_fetch_assoc($result)){
            $sql2="SELECT  * FROM compcontainsmaterial WHERE compID= $compID;";
            $result2=mysqli_query($conn, $sql2);
            if($result2){
                $num = mysqli_num_rows($result2);
            }
            $sql3="SELECT * FROM files WHERE fileCompID= $compID;";
            $result3=mysqli_query($conn, $sql3);
            if($result3){
            $num1 = mysqli_num_rows($result3);
            }                
            $compID = $row['compID'];
            $mainContainsID = $row['mainContainsID'];
            $compArtNum = $row['compArtNum'];
            $compName = $row['compName'];
            $compWeight = $row['compWeight'];
            $quantity = $row['mainContainsQuantity'];
            $totWeight = ($compWeight * $quantity);
            $sqlmaterialN2 = "SELECT * FROM materialContainsN2 WHERE";
            $sqlN3N2 = "";
            $sqlN4N3 = "";
            echo '
            <tr class="tabell-rad">
            <td style="visibility: hidden;">'.$mainContainsID.'</td>
            <td>'.$compArtNum.'</td>
            <td>'.$compName.'</td>
            <td>'.$totWeight.'</td>
            <td>'.$quantity.'</td>
            <td>
                ';
                if($num1 > 0){
                echo '<a title="Show documentation ('.$num1.')" href="./uploads.php?compID='.$compID.'&mainID='.$id.'"><img class="knapp" src="'.$documentation_icon.'"></a>';
                }else{
                echo '<a title="Add Documentation" href="./uploads.php?compID='.$compID.'&mainID='.$id.'"><img class="knapp" src="'.$documentation_add_icon.'"></a>';
                }
                if($num > 0){
                echo '<a title="Show substances ('.$num.')" href="./listCompMaterial.php?compID='.$compID.'&mainID='.$id.'"><img class="knapp" src="'.$substances_icon.'"></a>';
                }
                else{
                echo '<a title="Add substances" href="./linkMaterialToComp.php?compID='.$compID.'&mainID='.$id.'"><img class="knapp-gul" src="'.$substance_add_icon.'"></a>';
                }echo '
                <a title="Change weight" href="./updatecomp.php?compID='.$compID.'&mainID='.$id.'"><img class="knapp" src="'.$settings_icon.'"></a>
                <a title="Delete" href="./deleteCompOnMain.php?mainContainsID='.$mainContainsID.'"><img class="knapp-r?�d" src="'.$delete_icon.'"></a>
            </td>
            </tr>';
            }
        //H?�r ?�r knappen som ska l?�nka till filuppladdning
        //<button type="submit" class="knapp-tabell knapp"><a class="knapp-l?�nk" href="./uploads.php?compID='.$compID.'&mainID='.$id.'">Dokumentation</a></button>
      } else {
        echo "H?�r fanns det inget";
      }
    ?>
  </table>