Php 数组在json解码后删除父数组

我正在开发一个支持系统，用户可以将会话保存在数据库中，公司可以在另一台计算机上打开会话来帮助他

我的问题：

Array
(
    [splashback] => Array
        (
            [dimensions] => Array
                (
                    [width] => 1200
                    [height] => 800
                )

            [hole] => Array
                (
                    [choice] => false
                )

            [holes] => Array
                (
                    [0] => Array
                        (
                            [type] => Array
                                (
                                    [type] => single
                                    [name] => Single socket
                                )

                            [x] => 120
                            [y] => 300
                        )
                )
        )
)

Array
(
    [0] => Array
        (
            [splashback] => Array
                (
                    [dimensions] => Array
                        (
                            [width] => 1200
                            [height] => 800
                        )

                    [hole] => Array
                        (
                            [choice] => false
                        )

                    [holes] => Array
                        (
                            [0] => Array
                                (
                                    [type] => Array
                                        (
                                            [type] => single
                                            [name] => Single socket
                                        )

                                    [x] => 120
                                    [y] => 300
                                )
                        )
                )
        )
)

问题是，在解码json之后，我的会话数组中有一个额外的级别。（下面是手表阵列）

• 因此，我需要在之后删除该级别（父数组）
• 或者我需要以另一种方式保存/导入它

我的功能：

此函数用于保存会话和json_encode，并将其保存在数据库行中。然后返回一个“支持url”，公司可以打开该url来加载会话

function gtp_support_request( $referer ) {
    global $wpdb;

    $url_id         = url_to_postid( $referer );
    $request_id = time();
    $table      = $wpdb->prefix . 'support_requests';

    if( isset( $_SESSION ) ) 
        $config     = json_encode( $_SESSION );
    else 
        $config     = '';   

    $wpdb->insert( 
        $table,
        array(
            'request_id'        => $request_id,
            'config'            => $config,
            'url_id'            => $url_id,
        ),
        array( '%d', '%s', '%d' )
    );
    $request_url = get_permalink( $url_id ) . '?support_id=' . $request_id;
    echo $request_url;
}

function gtp_load_support_request() {
    global $wpdb;

    if( ! empty( $_GET['support_id'] ) ) {
        $request_id     = $_GET['support_id'];
        $table          = $wpdb->prefix . 'support_requests';
        $results        = $wpdb->get_results( "SELECT config FROM $table WHERE request_id = $request_id" );
        $config         = json_decode( $results[0]->config, true );


        $_SESSION[]     = $config;
    }
}

此函数通过URL中的支持id从数据库获取json数据，然后json_解码配置并将其加载到会话中

function gtp_support_request( $referer ) {
    global $wpdb;

    $url_id         = url_to_postid( $referer );
    $request_id = time();
    $table      = $wpdb->prefix . 'support_requests';

    if( isset( $_SESSION ) ) 
        $config     = json_encode( $_SESSION );
    else 
        $config     = '';   

    $wpdb->insert( 
        $table,
        array(
            'request_id'        => $request_id,
            'config'            => $config,
            'url_id'            => $url_id,
        ),
        array( '%d', '%s', '%d' )
    );
    $request_url = get_permalink( $url_id ) . '?support_id=' . $request_id;
    echo $request_url;
}

function gtp_load_support_request() {
    global $wpdb;

    if( ! empty( $_GET['support_id'] ) ) {
        $request_id     = $_GET['support_id'];
        $table          = $wpdb->prefix . 'support_requests';
        $results        = $wpdb->get_results( "SELECT config FROM $table WHERE request_id = $request_id" );
        $config         = json_decode( $results[0]->config, true );


        $_SESSION[]     = $config;
    }
}

之前：

Array
(
    [splashback] => Array
        (
            [dimensions] => Array
                (
                    [width] => 1200
                    [height] => 800
                )

            [hole] => Array
                (
                    [choice] => false
                )

            [holes] => Array
                (
                    [0] => Array
                        (
                            [type] => Array
                                (
                                    [type] => single
                                    [name] => Single socket
                                )

                            [x] => 120
                            [y] => 300
                        )
                )
        )
)

Array
(
    [0] => Array
        (
            [splashback] => Array
                (
                    [dimensions] => Array
                        (
                            [width] => 1200
                            [height] => 800
                        )

                    [hole] => Array
                        (
                            [choice] => false
                        )

                    [holes] => Array
                        (
                            [0] => Array
                                (
                                    [type] => Array
                                        (
                                            [type] => single
                                            [name] => Single socket
                                        )

                                    [x] => 120
                                    [y] => 300
                                )
                        )
                )
        )
)

新阵列：

Array
(
    [splashback] => Array
        (
            [dimensions] => Array
                (
                    [width] => 1200
                    [height] => 800
                )

            [hole] => Array
                (
                    [choice] => false
                )

            [holes] => Array
                (
                    [0] => Array
                        (
                            [type] => Array
                                (
                                    [type] => single
                                    [name] => Single socket
                                )

                            [x] => 120
                            [y] => 300
                        )
                )
        )
)

Array
(
    [0] => Array
        (
            [splashback] => Array
                (
                    [dimensions] => Array
                        (
                            [width] => 1200
                            [height] => 800
                        )

                    [hole] => Array
                        (
                            [choice] => false
                        )

                    [holes] => Array
                        (
                            [0] => Array
                                (
                                    [type] => Array
                                        (
                                            [type] => single
                                            [name] => Single socket
                                        )

                                    [x] => 120
                                    [y] => 300
                                )
                        )
                )
        )
)

---

恢复时，您可以通过不指定整个结果而是指定其中的第一个元素来解决此问题：

$_SESSION[]     = $config[0];

编辑

json\u decode

返回

\stdClass

的实例，而不是数组。这意味着您需要将其转换为数组，然后才能像数组一样访问密钥

试试这个：

$config = (array)json_decode( $results[0]->config, true );
$_SESSION[] = $config[0];

---

我需要这样做：

$_SESSION = $config;

而不是：

$_SESSION[] = $config;

---

是不是在同一个地方转储了

$config

的内容？对不起，我不知道你的确切意思。我是说，你是从哪里转储了你在问题中包含的新数组的？此时，新数组的索引肯定为0；在我的网站的标题中。请尝试在还原它之后立即放置它（

$\u SESSION=$config

）