ThinkPHP採用<volist>實現三級迴圈代碼執行個體_php執行個體

本文以執行個體描述了ThinkPHP採用標籤實現三級迴圈代碼，具體操作步驟如下：

1. 三級迴圈需要三維數組，實現代碼如下：

function MakeTree($pid,$level) {  $map['pid'] = $pid; $map['level'] = $level; $result = $this->where($map)->order('rank ASC')->findall(); if($result){  foreach ($result as $key => $value){  $title = $value['alias'];  $list[$title]['id'] = $value['id'];  $list[$title]['pid'] = $value['pid'];  $list[$title]['alias']= $value['alias'];  $list[$title]['title'] = $value['title'];  $list[$title]['level'] = $value['level'];  $list[$title]['state'] = $value['state'];  $list[$title]['rank'] = $value['rank'];  if($value['level']<=3){   $list[$title]['child'] = $this->_MakeSonTree($value['id']); }  } } return $list; } function _MakeSonTree($pid) { $map['pid'] = $pid; $result = $this->where($map)->order('rank ASC')->findall(); if($result){  foreach ($result as $key => $value){  $title = $value['alias'];  $list[$title]['id']= $value['id'];  $list[$title]['pid']= $value['pid'];  $list[$title]['alias']= $value['alias'];  $list[$title]['title'] = $value['title'];  $list[$title]['level'] = $value['level'];  $list[$title]['state'] = $value['state'];  $list[$title]['rank'] = $value['rank'];   if($this->haschild($value['id'])){  //先判斷是否有第三級子類,最後的數組形如$result['child']['grandchild'];   $list[$title]['grandchild']=$this->_MakeSonTree($value['id']);   }  } } return $list;  } function haschild($id){ $result=D('LearningChannel')->where("pid=".$id)->find(); if($result){  return true;  }  else return false; }

2.綁定volist標籤：

 $result=D('Learning') ->MakeTree(0,1);  //dump($result); $this->assign('list',$result);

3.模板部分：

     selected >{$vo.alias}      selected >--{$child.alias}       selected >---{$grand.alias}          

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