我正在尝试缓存JSON API响应，因此我不会经常访问Meetup API服务器：
header('Content-Type: application/json');
$cURL = curl_init();
curl_setopt($cURL, CURLOPT_URL, "https://api.meetup.com/2/events?back&fields=event_hosts&group_urlname=$group_urlname&page=999&api&key=$api_key");
curl_setopt($cURL, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($cURL, CURLOPT_SSL_VERIFYPEER, 0);
echo json_encode(json_decode(curl_exec($cURL)))
这输出JSON很好，但它没有验证。 JSON代码如下所示：
{"results":[{"status":"upcoming","visibility":"public","maybe_rsvp_count":0,"venue":{"id":20151862,"lon":-0.080918,"repinned":false,"name":"ISTD2 DANCE STUDIOS, ","address_1":"346 Old Street, EC1V 9NQ ","lat":51.526608,"country":"gb","city":"London"},"event_hosts":[{"member_name":"Ram Maree","member_id":12204723},{"member_name":"Jon","member_id":62369612},{"member_name":"David Murray","member_id":126425602}],"fee":{"amount":5,"description":"per person","label":"Price","required":"0","accepts":"paypal","currency":"GBP"},"id":"220172436","utc_offset":0,"duration":5400000,"time":1423594800000,"waitlist_count":0,"updated":1423429374000,"yes_rsvp_count":20,"created":1422568871000,"event_url":"http:\/\/www.meetup.com\/Public-Speaking-for-Dummies\/events\/220172436\/"
当我浏览http://jsonlint.com/代码时，代码无法验证。我收到一个Parse错误，如：
第420行解析错误：...＆＃34; event_url＆＃34;：＆＃34; http：//www.meetup ----------------------- ^期待＆＃39; STRING＆＃39;，＆＃39; NUMBER＆＃39;，＆＃39; NULL＆＃39 ;，＆＃39; TRUE＆＃39;，＆＃39; FALSE＆＃39;，＆＃39; {＆＃39;，＆＃39; [＆＃39;
有没有人知道如何使用PHP以正确的格式返回JSON API？
此外，当我直接访问JSON api调用时，JSON会进行验证。所以一旦PHP涉及到问题就会出现问题。