PHP JSON_DECODE删除双引号中的双引号？

Question

我正在使用来自http://api.ihackernews.com/的hackernews api。我通过JSON获得结果。

我遇到了php函数json_decode（）的问题。它工作正常，除非有很多双引号。

错误在于 "Ask PG: Will you post an update to "StartupIdeasWeu0027dLiketoFund"?" in：

{
 "title": "Ask PG: Will you post an update to "StartupIdeasWeu0027dLiketoFund"?",
 "url": "/comments/6014422",
 "id": 6014422,
 "commentCount": 58,
 "points": 214,
 "postedAgo": "12 hours ago",
 "postedBy": "awwstn"
}

如何将"Ask PG: Will you post an update to "StartupIdeasWeu0027dLiketoFund"?"替换为"Ask PG: Will you post an update to \"StartupIdeasWeu0027dLiketoFund\"?"？