while循环不显示所有值

Question

I am having this weird problem. There are seven admins: darth, jane, luke, najin, root, sam and sydney.

CODE:

    <table>
          <tr>
            <th style="text-align: left; width: 200px;">Username</th>
            <th colspan="2" style="text-align: left;">Action</th>
          </tr>
        <?php 

            $sql = "SELECT * FROM admins ORDER BY Admin_Username ASC";
            $result = mysqli_query($connection, $sql);
            $admin = mysqli_fetch_assoc($result);

            while($admin = mysqli_fetch_assoc($result)) { 
            ?>
          <tr>
            <td><?php echo ($admin["Admin_Username"]); ?></td>
            <td><a href="edit_admin.php?id=<?php echo urlencode($admin["id"]); ?>">Edit</a></td>
            <td><a href="delete_admin.php?id=<?php echo urlencode($admin["id"]); ?>" onclick="return confirm('Are you sure you want to delete this admin?');">Delete</a></td>
          </tr>
        <?php     
} 
?>
</table>

If I use ASC order, the first admin, darth is not displayed in the loop and if I use DESC order, the last admin, sydney doesn't show up. What could be the problem here?

Answer 1

Get rid of the first $admin = line.

Your loop will fetch all of them; you don't need to fetch the first one separately (and if fact by doing so are skipping it, because your loop immediately fetches the second before the first one could be written out).

Answer 2

删除此行

 $admin = mysqli_fetch_assoc($result);//You already fetching the first result here

Answer 3

You have a redundant call to $admin = mysqli_fetch_assoc($result); before the while loop which will cause you to skip the first row of the result. Just remove it and you should be fine.

Answer 4

    <?php 

            $sql = "SELECT * FROM admins ORDER BY Admin_Username ASC";
            $result = mysqli_query($connection, $sql);    
            while($admin = mysqli_fetch_assoc($result)) { 
            ?>
          <tr>
            <td><?php echo ($admin["Admin_Username"]); ?></td>
            <td><a href="edit_admin.php?id=<?php echo urlencode($admin["id"]); ?>">Edit</a></td>
            <td><a href="delete_admin.php?id=<?php echo urlencode($admin["id"]); ?>" onclick="return confirm('Are you sure you want to delete this admin?');">Delete</a></td>
          </tr>
    <?php     
    } 
    ?>

Answer 5

$admin = mysqli_fetch_assoc($result);

这必须在while循环中所以你可以在上面descard /删除旧值