如何在PHP中合并两个JSON字符串? [英] How can I merge two JSON strings in PHP?

问题描述

我有两个像这样的JSON字符串:

I have two JSON strings like these:

 $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:

I am trying to use this to merge them:

$images =  array_merge(json_decode($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:

错误:无法使用stdCLASS的对象类型.

ERROR: can not use object type of stdCLASS..

我在做什么错了?

推荐答案

调用json_decode时，会将其解码为对象.如果要使其成为数组，则必须这样做

When you're calling json_decode, you're decoding it as an object. If you want it to be an array, you have to do

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

有关json_decode的更多信息:
http://php.net/manual/en/function.json-decode. php

For more information about json_decode:
http://php.net/manual/en/function.json-decode.php

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