php多維陣列把value值賦值到key

php多維陣列把value值賦值到key，改成這種效果，怎麼做
"image": [
{
"local_path": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",
"picture_id": 1
},
{
"local_path": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",
"picture_id": 2
},
{
"local_path": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",
"picture_id": 3
}
]
改成：
"image": [
{
"1": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",
"picture_id": 1
},
{
"2": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",
"picture_id": 2
},
{
"3": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",
"picture_id": 3
}
]

回複討論(解決方案)

注意“：1,2,3是picture的值

'aaaaa','picture_id' =>1),array('local_path'=>'bbbbbbb','picture_id'=>2),array('local_path'=>'ccccccc','picture_id'=>3),);function change($arrr,$a=0){foreach($arrr as $key=>$value){$arr[$a][$value['picture_id']]=$value['local_path'];$arr[$a]['picture_id']=$value['picture_id'];$a++;}return $arr;}$arry=change($arr);print_r($arry);?>

'aaaaa','picture_id' =>1),array('local_path'=>'bbbbbbb','picture_id'=>2),array('local_path'=>'ccccccc','picture_id'=>3),);function change($arrr,$a=0){foreach($arrr as $key=>$value){$arr[$a][$value['picture_id']]=$value['local_path'];$arr[$a]['picture_id']=$value['picture_id'];$a++;}return $arr;}$arry=change($arr);print_r($arry);?>

這樣的確轉過來了。但如果是對象呢？怎麼轉

你這不是 php 的數組，是 json

$s =<<< TXT "image": [                {                    "local_path": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",                    "picture_id": 1                },                {                    "local_path": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",                    "picture_id": 2                },                {                    "local_path": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",                    "picture_id": 3                }            ]TXT;$a = json_decode('{'. $s .'}', 1);foreach($a['image'] as &$item) {  $item = array(    $item['picture_id'] => $item['local_path'],    'picture_id' => $item['picture_id']    );}print_r($a);

Array(    [image] => Array        (            [0] => Array                (                    [1] => /upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg                    [picture_id] => 1                )            [1] => Array                (                    [2] => /upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg                    [picture_id] => 2                )            [2] => Array                (                    [3] => /upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg                    [picture_id] => 3                )        ))

還原回 json

echo json_encode($a, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);

{    "image": [        {            "1": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",            "picture_id": 1        },        {            "2": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",            "picture_id": 2        },        {            "3": "/upload/14d4aaf3c5ef5b93e6c4c7418428ea71.jpg",            "picture_id": 3        }    ]}

'aaaaa','picture_id' =>1),array('local_path'=>'bbbbbbb','picture_id'=>2),array('local_path'=>'ccccccc','picture_id'=>3),);function change($arrr,$a=0){foreach($arrr as $key=>$value){$arr[$a][$value['picture_id']]=$value['local_path'];$arr[$a]['picture_id']=$value['picture_id'];$a++;}return $arr;}$arry=change($arr);print_r($arry);?>

如果$arr是對象，而不是數組怎麼做呢？

當字串處理吧。祖寧給你的方法你都無法接受，那就用正則當字串處理吧

