在PHP中处理格式错误的JSON [英] Handling malformed JSON in PHP

问题描述

我正在尝试编写一个php脚本来处理来自Web服务的数据，该服务以字符串形式传递"json".问题是字符串不是真正的json；它是javascript.具体来说，虽然变量是带引号的，但键不带引号.示例(实际数据更长，更复杂):

I'm trying to write a php script that handles data from a webservice that delivers "json" as a string. The problem is the string isn't really json; it's javascript. Specifically, the keys are not quoted, although the variables are. Example (the actual data is much longer and more complicated):

{desc:'User defined payload'}

如 php手册所述，json_decode()正确地无法解释该字符串.

As described by the php manual, json_decode() correctly fails to interpret this string.

我的问题是，如何在php中成功解释这样的字符串?

My question is, how can I successfully interpret a string like this in php?

我能想到的唯一解决方案是编写一些可修复语法的正则表达式，但随后我会遇到两个问题.

The only solution I can think of is to write some regular expressions that fix the syntax, but then I'd have two problems.

编辑

Hadvig关于使用Services_JSON pear模块的建议有效，并且看起来像是通用解决方案.安装模块后，我的代码如下所示:

Hadvig's suggestion of using the Services_JSON pear module worked, and looks like a general solution. Once I had the module installed, my code looked like this:

require_once 'PEAR.php';
require_once 'Services/JSON.php';

$Services_JSON = new Services_JSON();
$data = $Services_JSON->decode($malformed_json);

不幸的是，这很慢.解释整个字符串(〜400,000个字符)需要> 36秒！使用正则表达式来固定引号，然后使用json_decode花费了约0.04秒.这是我用的:

Unfortunately, this is SLOW. To interpret the whole string (~400,000 chars) took > 36 seconds! Using a regular expression to fix the quotes and then using json_decode took ~0.04 seconds. Here's what I used:

// fix single quotes
$s = str_replace("'", '"', $malformed_json);

// fix unquoted keys
$valid_json = preg_replace('/([{\[,])\s*([a-zA-Z0-9_]+?):/', '$1"$2":', $s);

$data = json_decode($valid_json);

当然，如果数据包含任何引号，方括号或逗号，则此操作将中断.

Of course, this will break if the data contains any quotes, brackets, or commas.

推荐答案

好.尝试使用这个. http://pear.php.net/pepr/pepr-proposal -show.php?id = 198 我只是检查您的字符串

Ok. try to use this. http://pear.php.net/pepr/pepr-proposal-show.php?id=198 I just check your string

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