Thinkphp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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