PHP从文件读取和写入JSON [英] PHP read and write JSON from file

问题描述

我在文件list.txt中具有以下JSON:

I have the following JSON in a file list.txt:

{
"bgates":{"first":"Bill","last":"Gates"},
"sjobs":{"first":"Steve","last":"Jobs"}
}

如何使用PHP将"bross":{"first":"Bob","last":"Ross"}添加到文件中?

How do I add "bross":{"first":"Bob","last":"Ross"} to my file using PHP?

这是我到目前为止所拥有的:

Here's what I have so far:

<?php

$user = "bross";
$first = "Bob";
$last = "Ross";

$file = "list.txt";

$json = json_decode(file_get_contents($file));

$json[$user] = array("first" => $first, "last" => $last);

file_put_contents($file, json_encode($json));

?>

这给了我一个致命错误:无法在此行上将stdClass类型的对象用作数组:

Which gives me a Fatal error: Cannot use object of type stdClass as array on this line:

$json[$user] = array("first" => $first, "last" => $last);

我正在使用PHP5.2.有什么想法吗?谢谢！

I'm using PHP5.2. Any thoughts? Thanks!

推荐答案

错误消息中的线索是-如果您查看

The clue is in the error message - if you look at the documentation for json_decode note that it can take a second param, which controls whether it returns an array or an object - it defaults to object.

因此将您的呼叫更改为

$json = json_decode(file_get_contents($file), true);

它将返回一个关联数组，您的代码应该可以正常工作.

And it'll return an associative array and your code should work fine.

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