使用关联数组

Question

我正在尝试访问另一个数组内部的关联数组的位置。

这是我的数组：

    Array
(
    [order_data] => stdClass Object
        (
            [id_order] => 2
            [id_client] => 1
            [date_order] => 2022-04-03 18:43:18
            [address] => meu puto
            [city] => Rabinho
            [email] => 40834@aeds.pt
            [cellphone] => 919788427
            [code_order] => QX669156
            [status] => PENDIG
            [message] => 
            [created_at] => 2022-04-03 18:43:18
            [updated_at] => 2022-04-03 18:43:18
        )

    [products_order] => Array
        (
            [0] => stdClass Object
                (
                    [id_order_product] => 8
                    [id_order] => 2
                    [name_product] => Green Tshirt
                    [price_unity] => 35.15
                    [quantity] => 1
                    [created_at] => 2022-04-03 18:43:18
                )

        )

)

我正在尝试访问名称为 name_product 的字段这是我的代码：

$image = $order_details['products_order']['name_product']);

这给了我以下错误

Undefined array key "name_product"

可能只是一件简单的事情。

Answer 1

$image = $order_details['products_order'][0]);

Answer 2

看到[0] => stdClass Object中的[0]了吗？以下应该有效...

$image = $order_details['products_order'][0]['name_product'];

Answer 3

数据结构是一个array of array of object

这应该适合你：

$image = $order_details['products_order'][0]->name_product;

Answer 4

您不能像通常访问数组那样访问您的数据，正如@Omar_Tammam所说您正在使用数组对象。

以下示例说明了您的数据是如何设置的以及如何使用它：

    # Creating your stdclass Object Array
    $order_details['order_data'] = new stdClass();
    $order_details['order_data']->id_order = 2;
    $order_details['order_data']->id_client = 1;
    $order_details['order_data']->date_order = "2022-04-03 18:43:18";
    $order_details['order_data']->address = "meu puto";
    $order_details['order_data']->city = "Rabinho";
    $order_details['order_data']->email = "40834@aeds.pt";
    $order_details['order_data']->cellphone = "919788427";
    $order_details['order_data']->code_order = "QX669156";
    $order_details['order_data']->status = "PENDING";
    $order_details['order_data']->message = "";
    $order_details['order_data']->created_at = "2022-04-03 18:43:18";
    $order_details['order_data']->updated_at = "2022-04-03 18:43:18";
    $order_details['products_order'][0] = new stdClass();
    $order_details['products_order'][0]->id_order_product = "8";
    $order_details['products_order'][0]->id_order = "2";
    $order_details['products_order'][0]->name_product = "Green Tshirt";
    $order_details['products_order'][0]->price_unity = "35.15";
    $order_details['products_order'][0]->quantity = "1";
    $order_details['products_order'][0]->created_at = "2022-04-03 18:43:18";
    
    # To print all the data as example, showing stdClass Objects can 
    # be accessed through a foreach similar to an array
    // foreach($order_details as $od){
    //     echo PHP_EOL, "_________________________", PHP_EOL;
    //     foreach($od as $a){
    //         if(!is_object($a)) echo $a, PHP_EOL;
    //         else foreach($a as $o) echo $o, PHP_EOL;
    //     }
    //     echo PHP_EOL, "_________________________", PHP_EOL;
    // }
    
    # this is wrong & will not work:
    echo $order_details['products_order'][0]['name_product'];
    
    # you would want to use this:
    echo $order_details['products_order'][0]->name_product;
    # more examples:
    echo $order_details['order_data']->address;
    echo $order_details['order_data']->city;
    echo $order_details['order_data']->email;
    echo $order_details['products_order'][0]->created_at;

    # or as you wanted:
    $image = $order_details['products_order'][0]->name_product;

    echo $image;
    # result would be: Green Tshirt

在线沙盒示例：https://onlinephp.io/c/76370

我还创建了一个递归函数，通过引用将数组与 stdClass 相互转换：

function array_to_stdClass(&$array){
    $tmp = $array;
    $array = new stdClass();
    foreach($tmp as $k => $v) $array->$k = (!is_object($v) && !is_array($v)) ? $v:array_to_stdClass($v);
    return $array;
}

function stdClass_to_array(&$stdClass){
    $tmp = $stdClass;
    $stdClass = array();
    foreach($tmp as $k => $v) $stdClass[$k] = (!is_object($v) && !is_array($v)) ? $v:stdClass_to_array($v);
    return $stdClass;
}

在线沙盒示例：https://onlinephp.io/c/4b183

使用关联数组

Using Associative arrays

php

mysql

sql

arrays

associative-array