<?php
/**
* @param array $list 要转换的结果集
* @param string $pid parent标记字段
* @param string $level level标记字段
*/
function list_to_tree($list, $pk=\'id\', $pid = \'pid\', $child = \'listArea\', $root = 0) {
//创建Tree
$tree = array();
if (is_array($list)) {
//创建基于主键的数组引用
$refer = array();
foreach ($list as $key => $data) {
$refer[$data[$pk]] = &$list[$key];
}
foreach ($list as $key => $data) {
//判断是否存在parent
$parantId = $data[$pid];
if ($root == $parantId) {
$tree[] = &$list[$key];
} else {
if (isset($refer[$parantId])) {
$parent = &$refer[$parantId];
$parent[$child][] = &$list[$key];
}
}
}
}
return $tree;
}
$arr = array(
array(\'id\'=>1,\'pid\'=>0,\'name\' => urlencode(\'大连\'), \'code\' => \'dd\', \'listArea\' => array()),
array(\'id\'=>2,\'pid\'=>1,\'name\' => urlencode(\'香港\'), \'code\' => \'dd\', \'listArea\' => array()),
array(\'id\'=>4,\'pid\'=>3,\'name\' => \'m\', \'code\' => \'dd\', \'listArea\' => array()),
array(\'id\'=>2,\'pid\'=>1,\'name\' => \'gg\', \'code\' => \'aa\', \'listArea\' => array()),
array(\'id\'=>3,\'pid\'=>1,\'name\' => \'e\', \'code\' => \'dd\', \'listArea\' => array())
);
//$array = array(array(\'id\'=>0,\'pid\'=>0,\'name\' => \'全国\'));
//$array2 = array_merge($array, $arr);
//array_push($arr, $array);
//print_r($array);exit;
$tree = list_to_tree($arr);
echo json_encode($tree);
注意：不会显示没有子节点的对象