php - 如何在php中将对象数组转换为键值对

Question

我有一个对象数组，我需要转换为键值对，我的代码是

我有一个模型:
模型设置.php

public function currency_info(){
     $currency_info = [
                ['code' => 'AED', 'name' => 'United Arab Emirates Dirham'],
                ['code' => 'ANG', 'name' => 'NL Antillian Guilder'],
                ['code' => 'ARS', 'name' => 'Argentine Peso'],
                ['code' => 'AUD', 'name' => 'Australian Dollar'],
                ['code' => 'BRL', 'name' => 'Brazilian Real'],
              ]
}

和 Controller 为:

设置 Controller .php

public function index()
{
        $setting = new Setting();
        $currency_list = $setting->currency_info();

        $result = [];
        foreach ($currency_list as $currency) {
            $result[$currency->code] = $currency->name;
        }

        return $result;
}

我收到以下错误:

ErrorException (E_NOTICE) Trying to get property 'code' of non-object

我哪里做错了，我该如何纠正？

Answer 1

由于您尝试迭代的数据是一个数组(来自对象)，符号应该是......

$result[$currency['code']] = $currency['name'];

或者，如果您想要更短的版本(取决于 PHP 的版本)，请使用 array_column() ...

$result = array_column($currency_list, 'name', 'code');