我正在尝试显示这样的数组:
$nodes = array(
1 => array(
'title' => 'NodeLvl1',
'children' => array(),
),
2 => array(
'title' => 'NodeLvl1',
'children' => array(
1 => array(
'title' => 'NodeLvl2',
'children' => array(),
),
2 => array(
'title' => 'NodeLvl2',
'children' => array(
1 => array(
'title' => 'NodeLvl3',
'children' => array(),
),
2 => array(
'title' => 'NodeLvl3',
'children' => array(),
),
),
),
),
),
3 => array(
'title' => 'NodeLvl1',
'children' => array(),
),
);如下所示:
<ul>
<li>
NodeLvl1
</li>
<li>
NodeLvl1
<ul>
<li>NodeLv2</li>
...
</ul>
</li>
...基本上是一个考虑了“孩子”属性的嵌套列表。到目前为止,我已经想出了这个:
class It extends RecursiveIteratorIterator{
protected
$tab = "\t";
public function beginChildren(){
if(count($this->getInnerIterator()) == 0)
return;
echo str_repeat($this->tab, $this->getDepth())."<ul>\n";
}
public function endChildren(){
if(count($this->getInnerIterator()) == 0)
return;
echo str_repeat($this->tab, $this->getDepth())."\n</ul>";
}
public function nextElement(){
echo str_repeat($this->tab, $this->getDepth() + 1).'<li>';
}
}
$it = new It(new RecursiveArrayIterator($nodes));
foreach($it as $key => $item)
echo $item;这并不能很好地工作:我将每个项目包装在<ul>s之间,但我不知道如何关闭<li>s……
有没有关于如何让它工作的想法?另外,是否可以获取所有数组属性(实际元素),而不仅仅是foreach()循环中的"title“属性?这可以用对象而不是数组来完成吗?
发布于 2012-03-07 21:12:40
不要试图像在foreach()中使用数组一样使用您的类,请考虑使用您的类来执行函数。例如,以下代码将正确输出,但函数是在类中执行的。
class It extends RecursiveIteratorIterator{
protected
$tab = "\t";
public function beginChildren(){
if(count($this->getInnerIterator()) == 0)
return;
echo str_repeat($this->tab, $this->getDepth())."<ul>\n";
}
public function endChildren(){
if(count($this->getInnerIterator()) == 0)
return;
echo str_repeat($this->tab, $this->getDepth)."\n</ul>";
}
public function nextElement(){
echo str_repeat($this->tab, $this->getDepth())."<li>".$this->current()."</li>\n";
}
}
$it = new It(new RecursiveArrayIterator($nodes));
foreach($it as $key => $item)
//echo $item;
//it will be better to write a function inside your custom iterator class to handle iterations
?>https://stackoverflow.com/questions/9474944
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