我有一个大字符串。以下是其中的一部分：
{"status":"ok","items":[{"image_versions":[{"url":"http:\/\/distilleryimage8.instagram.com\/11a67042c62311e1bf341231380f8a12_7.jpg","width":612,"type":7,"height":612},{"url":"http:\/\/distilleryimage8.instagram.com\/11a67042c62311e1bf341231380f8a12_6.jpg","width":306,"type":6,"height":306},{"url":"http:\/\/distilleryimage8.instagram.com\/11a67042c62311e1bf341231380f8a12_5.jpg","width":150,"type":5,"height":150}],"code":"MrMBxJo-O8","has_more_comments":true,"taken_at":1341438972.0,"comments":[{"media_id":228329104165036988,"_spam":false,"text":"I live in Oklahoma! :D Shoot them off with me! :D","created_at":1341441914.0,"user":{"username":"heather_all_over","pk":13296276,"profile_pic_url":"http:\/\/images.instagram.com\/profiles\/profile_13296276_75sq_1339538236.jpg","full_name":"Heather\ud83c\udf80","is_private":false},"content_type":"comment","pk":228353791620276525,"type":0},{"media_id":228329104165036988,"_spam":false,"text":"Wish I had that much money to spend.......","created_at":1341441916.0,"user":{"username":"l_mcnair","pk":23775741,"profile_pic_url":"http:\/\/images.instagram.com\/profiles\/profile_23775741_75sq_1339894045.jpg","full_name":"Lauryn","is_private":true},"content_type":"comment","pk":228353803204944174,"type":0},{"media_id":228329104165036988,"_spam":false,"text":"You should video tape you setting them all off","created_at":1341441939.0,"user":{"username":"ahrii_","pk":37732021,"profile_pic_url":"http:\/\/images.instagram.com\/profiles\/profile_37732021_75sq_1340907381.jpg","full_name":"Ahriana;-*","is_private":false},"content_type":"comment","pk":228353997065675057,"type":0},{"media_id":228329104165036988,"_spam":false,"text":"When did skrillex start selling
我试图匹配“pk”之后的每个数字：“。我一直在尝试展望未来但似乎无法正确使用。我对正则表达式了解不多，所以如果有人能指出我的话正确的方向会很棒！
答案 0 :(得分：4)
这看起来像是JSON响应。为什么不解析JSON并提取所有“pk”键的值？
答案 1 :(得分：2)
根据您使用的语言，正则表达式可能看起来不同，但这应该适用于大多数语言：
/"pk":(\d+)/g
这基本上是查找字符串“pk”：然后是所有数字，将这些数字放在捕获组中。最后的g使它搜索所有出现的事件。根据您使用的语言，您可能无法检索所有捕获。
答案 2 :(得分：1)
如果你想要之后的部分你应该使用look-behind：
(?<="pk":)\d+