PHP can be applied to the iterative search for family tree tree implementation method of breadcrumb navigation, applied to family tree_PHP tutorial

PHP can be applied to the iterative search for family tree tree implementation method of breadcrumb navigation, and can be applied to family trees

The example in this article describes the implementation method of iteratively searching for a family tree that can be applied to breadcrumb navigation in PHP. Share it with everyone for your reference. The specific implementation method is as follows:

<&#63;php
echo "<pre class="brush:php;toolbar:false">";
$area = array(
array('id'=>1,'area'=>'北京','pid'=>0),
array('id'=>2,'area'=>'广西','pid'=>0),
array('id'=>3,'area'=>'广东','pid'=>0),
array('id'=>4,'area'=>'福建','pid'=>0),
array('id'=>11,'area'=>'朝阳区','pid'=>1),
array('id'=>12,'area'=>'海淀区','pid'=>1),
array('id'=>21,'area'=>'南宁市','pid'=>2),
array('id'=>45,'area'=>'福州市','pid'=>4),
array('id'=>113,'area'=>'亚运村','pid'=>11),
array('id'=>115,'area'=>'奥运村','pid'=>11),
array('id'=>234,'area'=>'武鸣县','pid'=>21)
); 

function familytree($arr,$id){
 $list = array();
 while($id){
 $flag = false;
 foreach($arr as $v){
  if($v['id']==$id){
  array_unshift($list,$v['area']);
  $id = $v['pid'];
  $flag = true;
  }
 }
 if(!$flag){
  break;
 }
 }
 return $list;
}
print_r(familytree($area,113));
&#63;>

I hope this article will be helpful to everyone’s PHP programming design.

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