Home >Backend Development >PHP Tutorial >Introduction to the method of generating unlimited column trees using php
This article describes how to use php to generate an infinite column tree
Array('cid' => 2,'cname' => 'News','pid' => 0),
Array('cid' => 4,'cname' =>'Sports ','pid' => 0),
Array('cid' => 5,'cname' => 'Entertainment','pid' => 0),
Array('cid ' => 7,'cname' => 'Hot news','pid' =>2),
Array('cid' => 8,'cname' => 'Niche news' ,'pid' => 2),
Array('cid' => 9,'cname' => 'Folk News','pid' => 8),
) ;
<?php $arr=Array( Array('cid' => 2,'cname' => '新闻','pid' => 0), Array('cid' => 4,'cname' =>'体育','pid' => 0), Array('cid' => 5,'cname' => '娱乐','pid' => 0), Array('cid' => 7,'cname' => '热点新闻','pid' =>2), Array('cid' => 8,'cname' => '小众新闻','pid' => 2), Array('cid' => 9,'cname' => '民谣新闻','pid' => 8), ); function formatTree($array, $pid = 0,$level = 1,$field = array('pid'=>'pid','id'=>'id','children'=>'children')){ $arr = array(); foreach ($array as &$v) { if ($v[$field['pid']] == $pid) { $v['level'] = $level; $tem = formatTree($array, $v[$field['id']],$v['level']+1,$field); //判断是否存在子数组 $tem && $v[$field['children']] = $tem; $arr[] = $v; } } return $arr; } $tree = formatTree( $arr,0,1, $field = array('pid'=>'pid','id'=>'cid','children'=>'children') ); echo '<pre class="brush:php;toolbar:false">'; print_r( $tree); ?>
The above is the detailed content of Introduction to the method of generating unlimited column trees using php. For more information, please follow other related articles on the PHP Chinese website!