我得到了json,我已经将其转换为php数组,下面是print_r:
Array
(
[0] => Array
(
[id] => 187
)
[1] => Array
(
[id] => 209
[children] => Array
(
[0] => Array
(
[id] => 210
)
[1] => Array
(
[id] => 211
)
)
)
[2] => Array
(
[id] => 188
[children] => Array
(
[0] => Array
(
[id] => 196
)
[1] => Array
(
[id] => 197
)
[2] => Array
(
[id] => 198
)
)
)
[3] => Array
(
[id] => 189
[children] => Array
(
[0] => Array
(
[id] => 193
)
)
)
[4] => Array
(
[id] => 202
[children] => Array
(
[0] => Array
(
[id] => 190
)
[1] => Array
(
[id] => 191
)
[2] => Array
(
[id] => 206
)
[3] => Array
(
[id] => 192
)
)
)
[5] => Array
(
[id] => 203
[children] => Array
(
[0] => Array
(
[id] => 204
)
[1] => Array
(
[id] => 205
)
[2] => Array
(
[id] => 207
)
[3] => Array
(
[id] => 208
)
)
)
[6] => Array
(
[id] => 194
)
)
现在,我想将该数组转换为一个列表,以便最终更新数据库。但我不知道如何做子数组:
到目前为止,我有:
$arrayList = json_decode(stripslashes($_POST['nestable-output']), true);
foreach ($arrayList as $array1){
foreach ($array1 as $pageID => $pageOrder){
echo $pageID . "-" . $pageOrder . "<br/>";
//foreach ($pageOrder as $pageID2 => $pageOrder2){
// echo $pageID2 . "-" . $pageOrder2 . "<br/>";
//}
}
}
我知道评论的部分是不正确的,因为它给了我一个"提供的参数无效",但有人能告诉我这里的正确方法是什么吗?
以下是我当前的输出,没有评论部分:
id-187
id-209
children-Array
id-188
children-Array
id-189
children-Array
id-202
children-Array
id-203
children-Array
id-194
无论id是id
还是children
,您都试图循环遍历每个。由于键为id
时的值是一个数字,而不是数组,因此在尝试作为foreach运行时会失败。相反,只有当你知道它是一个数组时才循环(strcmp开始发挥作用):
$arrayList = json_decode(stripslashes($_POST['nestable-output']), true);
foreach ($arrayList as $array1){
foreach ($array1 as $pageID => $pageOrder){
echo $pageID . "-" . $pageOrder . "<br/>";
if(strcmp("children", $pageID) == 0)) {
foreach ($pageOrder as $pageID2 => $pageOrder2){
echo $pageID2 . "-" . $pageOrder2 . "<br/>";
}
}
}
}
由于试图将ID值(整数)传递给第二个foreach
构造,因此出现"无效参数"错误。
尝试修改您的代码以读取:
$arrayList = json_decode(stripslashes($_POST['nestable-output']), true);
foreach ($arrayList as $array1){
foreach ($array1 as $pageID => $pageOrder){
echo $pageID . "-" . $pageOrder . "<br/>";
if($pageID == 'children') {
foreach ($pageOrder as $pageID2 => $pageOrder2){
echo $pageID2 . "-" . $pageOrder2 . "<br/>";
}
}
}
}
您不会从foreach($array1...)
中获得$pageID => $pageOrder
。你得到了$key => $value
。$key可以等于字符串"id",在这种情况下,$value将是数组中的id号。您的$key也可以等于字符串"children",在这种情况下,$value将是您的子id数组。
据我所知,您希望从多维数组中获得一个字符串。试试这样的东西:
$arrayList = json_decode(stripslashes($_POST['nestable-output']), true);
$list = trim(array_walk($arrayList, 'get_ids'), ',');
function get_ids($array_list) {
$list = '';
foreach($array_list as $key => $value) {
if('children' == $key) $list .= get_ids($value)
else {
foreach($value as $index => $id) $list .= $id . ', ';
}
}
return $list;
}
请注意,即使您的阵列深度超过2层,这也应该有效。