基于php-simplexml-写出xml转json配上注释

Everyday Italian Giada De Laurentiis 2005 30.00 Harry Potter J.K. Rowling 2005 29.99 Learning XML Erik T. Ray 2003 39.95 XML; //将XML字符串转换为SimpleXMLElement对象 $xml = new SimpleXMLElement($xmlString); //将SimpleXMLElement对象转换为JSON $json = json_encode($xml); //输出JSON字符串 echo $json; //输出JSON字符串（带注释） echo json_encode($xml, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); ?>

/* 输出结果： {"book":[{"@attributes":{"category":"COOKING"},"title":{"@attributes":{"lang":"en"},"0":"Everyday Italian"},"author":"Giada De Laurentiis","year":"2005","price":"30.00"},{"@attributes":{"category":"CHILDREN"},"title":{"@attributes":{"lang":"en"},"0":"Harry Potter"},"author":"J.K. Rowling","year":"2005","price":"29.99"},{"@attributes":{"category":"WEB"},"title":{"@attributes":{"lang":"en"},"0":"Learning XML"},"author":"Erik T. Ray","year":"2003","price":"39.95"}]} */

/* 输出结果（带注释）： { "book": [ { "@attributes": { "category": "COOKING" }, "title": { "@attributes": { "lang": "en" }, "0": "Everyday Italian" }, "author": "Giada De Laurentiis", "year": "2005", "price": "30.00" }, { "@attributes": { "category": "CHILDREN" }, "title": { "@attributes": { "lang": "en" }, "0": "Harry Potter" }, "author": "J.K. Rowling", "year": "2005", "price": "29.99" }, { "@attributes": { "category": "WEB" }, "title": { "@attributes": { "lang": "en" }, "0": "Learning XML" }, "author": "Erik T. Ray", "year": "2003", "price": "39.95" } ] } */