php生成json文件解决方法

php生成json文件
json文件

{

    title: "站点名",

    link: "http://站点地址.com/list_1/index.html",

    description: "简介",

    item: [

        {

            title: "标题标题1",

            link: "http://内容地址1.html",

            pdate: "2014-03-01 00:00:00",

            summary: "正文正文正文正文正文正文",

            imgurl: "http://图片1.jpg|http://图片2.png|http://图片3.gif"

        },

        {

            title: "标题标题2",

            link: "http://内容地址2.html",

            pdate: "2014-03-01 00:00:00",

            summary: "正文正文正文正文正文正文",

            imgurl: "http://图片1.jpg|http://图片2.png|http://图片3.gif"

        }

    ]

}