php json取值问题，请大家帮忙

phpjson

{"success":"1","result":{"count":"1","lists":[{"areaid":"93","postcode":"130000","areacode":"0431","areanm":"*,吉林省,长春市","simcall":"中国,吉林,长春"}]}}想取去areaid、postcode的值，该怎么写呢？感谢您朋友！