blocks|key|1197000|text|通常，您会这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1197001|$post_data+=+json_encode(array('item'+=>+$post_data));|code-block|syntax|javascript|1197002|但是，看起来您希望输出为"{}"，您最好确保通过传递JSON_FORCE_OBJECT常量强制json_encode()编码为object。|offset|length|style|CODE|1197003|$post_data+=+json_encode(array('item'+=>+$post_data),+JSON_FORCE_OBJECT);|1197004|根据{}规范，“JSON”括号指定一个对象，"[]“用于数组。|1197005|entityMap|0|LINK|mutability|MUTABLE|url|https://secure.php.net/manual/en/function.json-encode.php^0|0|0|D|2|Q|H|1B|D|1B|D|0|0|0|2|2|N|2|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@$I|11|J|12|K|L]|$I|13|J|14|K|L]|$I|15|J|16|K|L]]|9|@$I|17|J|18|1|19]]|A|$]]|$1|M|3|N|5|D|7|1A|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1B|8|@$I|1C|J|1D|K|L]|$I|1E|J|1F|K|L]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Usually, you would do something like this:

<pre><code>$post_data = json_encode(array('item' =&gt; $post_data));
</code></pre>

But, as it seems you want the output to be with "<code>{}</code>", you better make sure to force <a href="https://secure.php.net/manual/en/function.json-encode.php" rel="noreferrer"><code>json_encode()</code></a> to encode as object, by passing the <code>JSON_FORCE_OBJECT</code> constant.

<pre><code>$post_data = json_encode(array('item' =&gt; $post_data), JSON_FORCE_OBJECT);
</code></pre>

"<code>{}</code>" brackets specify an object and "<code>[]</code>" are used for arrays according to JSON specification.

blocks|key|1197045|text|你只需要在你的php数组中再加一层：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1197046|$post_data+=+array(
++'item'+=>+array(
++++'item_type_id'+=>+$item_type,
++++'string_key'+=>+$string_key,
++++'string_value'+=>+$string_value,
++++'string_extra'+=>+$string_extra,
++++'is_public'+=>+$public,
+++'is_public_for_contacts'+=>+$public_contacts
++)
);

echo+json_encode($post_data);|code-block|syntax|javascript|1197047|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You just need another layer in your php array:

<pre><code>$post_data = array(
 'item' =&gt; array(
 'item_type_id' =&gt; $item_type,
 'string_key' =&gt; $string_key,
 'string_value' =&gt; $string_value,
 'string_extra' =&gt; $string_extra,
 'is_public' =&gt; $public,
 'is_public_for_contacts' =&gt; $public_contacts
 )
);

echo json_encode($post_data);
</code></pre>

blocks|key|982625|text|虽然这里发布的其他答案有效，但我发现以下方法更自然：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|982626|$obj+=+(object)+[
++++'aString'+=>+'some+string',
++++'anArray'+=>+[+1,+2,+3+]
];

echo+json_encode($obj);|code-block|syntax|javascript|982627|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Although the other answers posted here work, I find the following approach more natural:

<pre><code>$obj = (object) [
 'aString' =&gt; 'some string',
 'anArray' =&gt; [ 1, 2, 3 ]
];

echo json_encode($obj);
</code></pre>

blocks|key|1197100|text|$post_data+=+[
++"item"+=>+[
++++'item_type_id'+=>+$item_type,
++++'string_key'+=>+$string_key,
++++'string_value'+=>+$string_value,
++++'string_extra'+=>+$string_extra,
++++'is_public'+=>+$public,
++++'is_public_for_contacts'+=>+$public_contacts
++]
];

$post_data+=+json_encode(post_data);
$post_data+=+json_decode(post_data);
return+$post_data;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1197101|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>$post_data = [
 "item" =&gt; [
 'item_type_id' =&gt; $item_type,
 'string_key' =&gt; $string_key,
 'string_value' =&gt; $string_value,
 'string_extra' =&gt; $string_extra,
 'is_public' =&gt; $public,
 'is_public_for_contacts' =&gt; $public_contacts
 ]
];

$post_data = json_encode(post_data);
$post_data = json_decode(post_data);
return $post_data;
</code></pre>

blocks|key|982655|text|你可以对一个泛型对象进行json编码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|982656|$post_data+=+new+stdClass();
$post_data->item+=+new+stdClass();
$post_data->item->item_type_id+=+$item_type;
$post_data->item->string_key+=+$string_key;
$post_data->item->string_value+=+$string_value;
$post_data->item->string_extra+=+$string_extra;
$post_data->item->is_public+=+$public;
$post_data->item->is_public_for_contacts+=+$public_contacts;
echo+json_encode($post_data);|code-block|syntax|javascript|982657|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You could json encode a generic object.

<pre><code>$post_data = new stdClass();
$post_data-&gt;item = new stdClass();
$post_data-&gt;item-&gt;item_type_id = $item_type;
$post_data-&gt;item-&gt;string_key = $string_key;
$post_data-&gt;item-&gt;string_value = $string_value;
$post_data-&gt;item-&gt;string_extra = $string_extra;
$post_data-&gt;item-&gt;is_public = $public;
$post_data-&gt;item-&gt;is_public_for_contacts = $public_contacts;
echo json_encode($post_data);
</code></pre>

I am trying to create an JSON object out of a PHP array. The array looks like this:
<pre><code>$post_data = array('item_type_id' =&gt; $item_type,
 'string_key' =&gt; $string_key,
 'string_value' =&gt; $string_value,
 'string_extra' =&gt; $string_extra,
 'is_public' =&gt; $public,
 'is_public_for_contacts' =&gt; $public_contacts);
</code></pre>
The code to encode the JSON look like this:
<pre><code>$post_data = json_encode($post_data);
</code></pre>
The JSON file is supposed to look like this in the end:
<pre class="lang-json prettyprint-override"><code>{
 &quot;item&quot;: {
 &quot;is_public_for_contacts&quot;: false,
 &quot;string_extra&quot;: &quot;100000583627394&quot;,
 &quot;string_value&quot;: &quot;value&quot;,
 &quot;string_key&quot;: &quot;key&quot;,
 &quot;is_public&quot;: true,
 &quot;item_type_id&quot;: 4,
 &quot;numeric_extra&quot;: 0
 }
}
</code></pre>
How can I encapsulate the created JSON code in the &quot;item&quot;: { JSON CODE HERE }.

How to create a JSON object

JSON

我正在尝试从PHP数组中创建一个JSON对象。该数组如下所示：$post_data = array('item_type_id' => $item_type,    'string_key' => $string_key,    'string_value' => $string_value,    'string_e...

问如何创建JSON对象
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