PHP recursive method to implement infinite classification examples_PHP tutorial

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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Unlimited classification codes for ecshop products

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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,...