php - 如何在 PHP 中合并两个 JSON 字符串？

Question

我有两个这样的 JSON 字符串:

 $json1 = '[ {"src":"1","order":"2"}, {"src":"10","order":"20"}, ... ]';

和

$json2 = '[ {"src":"4","order":"5"}, {"src":"6","order":"7"}, ... ]';

我正在尝试使用它来合并它们:

$images =  array_merge(json_decode($json1 ),json_decode($json2));

$json = '[';
    $comma = null;
    foreach($images as $image)
    {
        $comma = ',';
        $json .=      $comma.'{"src":"'.$image['src'].'","order":"'.$image['order'].'"}';
    }
    $json .= ']';
    echo $json;

但我收到此错误:

ERROR: can not use object type of stdCLASS..

我做错了什么？

Answer 1

当您调用 json_decode 时，您将其解码为一个对象。如果你想让它成为一个数组，你必须这样做

$images =  array_merge(json_decode($json1, true), json_decode($json2, true));

更多关于json_decode的信息:
http://php.net/manual/en/function.json-decode.php