如何使用cURL獲取jSON數(shù)據(jù)并解碼數(shù)據(jù)？所以我有一個返回jSON對象的鏈接，我需要將它解碼并放入PHP中的變量中。網(wǎng)址api.php?action=getThreads&hash=123fajwersa&node_id=4&order_by=post_date&order=desc&limit=1&grab_content&content_limit=1這是它返回的對象{     "count": 1,     "threads": {         "38752": {             "thread_id": 38752,             "node_id": 4,             "title": "The ShadyCraft Beta Launch!",             "reply_count": 45,             "view_count": 946,             "user_id": 2,             "username": "Shady",             "post_date": 1366956695,             "sticky": 0,             "discussion_state": "visible",             "discussion_open": 1,             "discussion_type": "",             "first_post_id": 226167,             "first_post_likes": 7,             "last_post_date": 1369094302,             "last_post_id": 228226,             "last_post_user_id": 2,             "last_post_username": "Shady",             "prefix_id": 19,             "tinhte_xentag_tags": "a:4:{i:0;s:9:\"minecraft\";i:2;s:4:\"news\";i:3;s:14:\"private server\";i:1;s:10:\"shadycraft\";}",             "content": {                 "count": 1,                 "content": {                     "226167": {                         "post_id": 226167,                         "thread_id": 38752,                         "user_id": 2,                         "username": "Shady",                    }                 }             }         }如果元素具有作為數(shù)組本身的[threads]元素，那么它就是元素。我怎么得到，也許[thread_id]元素的價值？