<?php
    $result = mysqli_query($conn, "SELECT id_task FROM task WHERE
    id_project=$id_project"); $i=0;
    $jumlahTask = mysqli_num_rows($result);
    while($row = mysqli_fetch_assoc($result)){
    $list[$i]= $row['id_task']; $i++;
    }

    for($i=0;$i<$jumlahTask;$i++){
    $result = mysqli_query($conn, "SELECT a.taskname, a.taskto,
    b.part_order, b.qty_order, b.unit_order FROM task a, orders b WHERE
    a.id_task=b.id_task AND a.id_task=$list[$i]");
    while($row = mysqli_fetch_assoc($result)){
    ?>