PHP recursive method to implement infinite classification examples_PHP tutorial

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Release: 2016-07-13 10:36:36
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Array:

The code is as follows
 代码如下
$items = array(
 array('id' => 1, 'pid' => 0, 'name' => '一级11' ),
 array('id' => 11, 'pid' => 0, 'name' => 'www.111cn.net 一级12' ),
 array('id' => 2, 'pid' => 1, 'name' => '二级21' ),
 array('id' => 10, 'pid' => 11, 'name' => '二级22' ),
 array('id' => 3, 'pid' => 1, 'name' => '二级23' ),
 array('id' => 12, 'pid' => 11, 'name' => '二级24' ),
 array('id' => 13, 'pid' => 12, 'name' => '三级31' ),
 array('id' => 9, 'pid' => 1, 'name' => '二级25' ),
);
$items = array(
array('id' => 1, 'pid' => 0, 'name' => 'Level 11' ),
array(' id' => 11, 'pid' => 0, 'name' => 'www.111cn.net Level 12' ),
array('id' => 2, 'pid' => 1, 'name' => 'Level 21' ),
array('id' => 10, 'pid' => 11, 'name' => 'Level 22 ' ),
array('id' => 3, 'pid' => 1, 'name' => 'Level 23' ),
array('id' => 12, 'pid' => 11, 'name' => 'Level 24' ),
array('id' => 13, 'pid' => 12, 'name' => ; 'Level 3 31' ),
array('id' => 9, 'pid' => 1, 'name' => 'Level 2 25' ),
);

Function:
 代码如下
function formatTree($array, $pid = 0){
 $arr = array();
 $tem = array();
 foreach ($array as $v) {
  if ($v['pid'] == $pid) {
   $tem = formatTree($array, $v['id']);
                        //判断是否存在子数组
   $tem && $v['son'] = $tem;
   $arr[] = $v;
  }
 }
 return $arr;
}
The code is as follows
function formatTree($array, $pid = 0){
$arr = array();
$tem = array();
foreach ($array as $v) {
if ($v['pid'] == $pid) {
$tem = formatTree($array, $v['id']);
                                                                                                     ​ Array
$tem && $v['son'] = $tem;
$arr[] = $v;
}
}
return $arr;}
    Among them, the array must contain id and pid to specify the hierarchical relationship between the array values ​​
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Array: The code is as follows $items = array( array('id' = 1, 'pid' = 0, ' name' = 'Level 11' ), array('id' = 11, 'pid' = 0, 'name' = 'www.111cn.net Level 12' ), array('id' = 2, 'pid ' = 1,...
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