我做了一个非常快速的测试：

I've done a very quick test :

$a = array(
    'id' => 152,
    'another' => 'test',
    'ananother' => 456,
);
$json = json_encode($a);
echo $json;

这似乎就像你描述的那样，如果我是没错？

This seems to be like what you describe, if I'm not mistaken ?

我得到的是输出：

{"id":152,"another":"test","ananother":456}

因此，在这种情况下，整数尚未转换为字符串。

So, in this case, the integers have not been converted to string.

尽管如此，这可能取决于我们使用的PHP版本：已经纠正了几个与json_encode相关的错误，具体取决于PHP的版本......

Still, this might be dependant of the version of PHP we are using : there have been a couple of json_encode related bugs corrected, depending on the version of PHP...

此测试是使用PHP 5.2.6进行的;我在PHP 5.2.9和5.3.0中得到了同样的东西;我没有其他5.2.x版本可供测试，但是： - （

This test has been made with PHP 5.2.6 ; I'm getting the same thing with PHP 5.2.9 and 5.3.0 ; I don't have another 5.2.x version to test with, though :-(

您使用的是哪个版本的PHP？或者您的测试用例比您发布的示例？

Which version of PHP are you using ? Or is your test-case more complex than the example you posted ?

可能有一个关于 http：/的错误报告/bugs.php.net/ 可能是相关的？例如， Bug＃40503 ：json_encode整数转换与PHP不一致？

Maybe one bug report on http://bugs.php.net/ could be related ? For instance, Bug #40503 : json_encode integer conversion is inconsistent with PHP ?

也许 Bug＃38680 也会让你感兴趣，顺便说一下？

Maybe Bug #38680 could interest you too, btw ?