如何在Joomla中获得用户组的所有孩子?

时间:2013-07-12 07:28:18

标签: php joomla mysqli joomla2.5 usergroups

我有user_groups

id  parent_id       title
1       0           Public
2       1           Registered
3       2           Author
4       3           Editor
12      2           Customer Group (Example)

你可以在这里看到注册(2)有2个孩子的身份证(3,12),而身份证(3)也有它的孩子(4)。所以它创造了一棵树。现在我需要在列表框中创建这样的树。所以我试过这样:

<?php
$db = JFactory::getDbo(); 
$query = "select grp.id, grp.title from #__usergroups AS grp where parent_id=2";
$db->setQuery($query);  
$groups = $db->loadObjectList();
?>
<tr>
    <td>Select Group</td>
    <td>
    <select name="usergroup">
    <option value="0"><?='Select Group';?></option>                 
    <?
    foreach($groups as  $group) {

        $query = "select grp.id, grp.title from #__usergroups AS grp where parent_id=".$group->id;
        $db->setQuery($query);  
        $groups2 = $db->loadObjectList();
    ?>
    <option value="<?=$group->id?>"><?=$group->title?></option>
    <?  if($groups2!=''){
            foreach($groups2 as $group2){
                $query = "select grp.id, grp.title from #__usergroups AS grp where parent_id=".$group2->id;
                $db->setQuery($query);  
                $groups3 = $db->loadObjectList();
            ?>
            <option value="<?=$group2->id?>">--<?=$group2->title?></option>
            <?
                if($groups3!=''){
                    foreach($groups3 as $group3){
                        $query = "select grp.id, grp.title from #__usergroups AS grp where parent_id=".$group3->id;
                        $db->setQuery($query);  
                        $groups4 = $db->loadObjectList();
                        ?>
                        <option value="<?=$group3->id?>">----<?=$group3->title?></option>
                        <?
                        if($groups4!=''){
                            foreach($groups4 as $group4){
                                ?>
                                <option value="<?=$group4->id?>">--------<?=$group4->title?></option>
                                <?
                            }
                        }
                    }
                }
            }
        }
    }?>
    </select>
    </td>
</tr>

但这不是最佳方式。如果我添加更多的子项目,那么这将无法工作,直到我进入另一个级别。所以我需要有效的方法来做到这一点,所以我不需要在将来添加级别。请帮忙!

1 个答案:

答案 0 :(得分:0)

您可以使用optgroup,例如,

<select>
  <optgroup label="Group 1">
    <option>Option 1.1</option>
  </optgroup> 
  <optgroup label="Group 2">
    <option>Option 2.1</option>
    <option>Option 2.2</option>
  </optgroup>
  <optgroup label="Group 3" disabled>
    <option>Option 3.1</option>
    <option>Option 3.2</option>
    <option>Option 3.3</option>
  </optgroup>
</select>

阅读此https://developer.mozilla.org/en-US/docs/Web/HTML/Element/optgroup