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HomeBackend DevelopmentPHP TutorialThinkphp中的volist标签用法简介_php实例

通常volist标签多用于查询数据集(select方法)的结果输出,通常模型的select方法返回的结果是一个二维数组,对此可以直接使用volist标签进行输出。

在控制器中首先对模版赋值,如下例所示:

$User = M('User');
$list = $User->limit(10)->select();
$this->assign('list',$list);

在模版定义如下,循环输出用户的编号和姓名:

<volist name="list" id="vo">
{$vo.id}:{$vo.name}<br/>
</volist>

Volist标签的name属性表示模板赋值的变量名称,因此不可随意在模板文件中改变。id表示当前的循环变量,可以随意指定,但需要确保不要和name属性冲突,例如:

<volist name="list" id="data">
{$data.id}:{$data.name}<br/>
</volist>

支持输出查询结果中的部分数据,例如输出其中的第5~15条记录:

<volist name="list" id="vo" offset="5" length='10'>
{$vo.name}
</volist>

输出偶数记录:

<volist name="list" id="vo" mod="2" >
<eq name="mod" value="1">
{$vo.name}
</eq>
</volist>

Mod属性还用于控制一定记录的换行,例如:

<volist name="list" id="vo" mod="5" >
{$vo.name}
<eq name="mod" value="4"><br/></eq>
</volist>

为空的时候输出提示:

<volist name="list" id="vo" empty="暂时没有数据" >
{$vo.id}|{$vo.name}
</volist>

empty属性不支持直接传入html语法,但可以支持变量输出,例如:

$this->assign('empty','<span class="empty">没有数据</span>');
$this->assign('list',$list);

然后在模板中使用:

<volist name="list" id="vo" empty="$empty" >
{$vo.id}|{$vo.name}
</volist>

输出循环变量:

<volist name="list" id="vo" key="k" >
{$k}.{$vo.name}
</volist>

如果没有指定key属性的话,默认使用循环变量i,例如:

<volist name="list" id="vo" >
{$i}.{$vo.name}
</volist>

如果要输出数组的索引,可以直接使用key变量,和循环变量不同的是,这个key是由数据本身决定,而不是循环控制的,例如:

<volist name="list" id="vo" >
{$key}.{$vo.name}
</volist>

模板中可以直接使用函数设定数据集,而不需要在控制器中给模板变量赋值传入数据集变量,如:

<volist name=":fun('arg')" id="vo">
{$vo.name}
</volist>
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