**JSON: JavaScript Object Notation(JavaScript 对象表示法)
JSON 是存储和交换文本信息的语法。类似 XML。
JSON 比 XML 更小、更快,更易解析。**
1. "名称/值"对的集合 不同语言中,它被理解为对象(object),记录(record),结构(struct),
字典(dictionary),哈希表(hash table),键列表(keyed list)等
{ "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" }
2. 值的有序列表 多数语言中被理解为数组(array)
{ "people": [
{ "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },
{ "firstName": "Jason", "lastName":"Hunter", "email": "bbbb"},
{ "firstName": "Elliotte", "lastName":"Harold", "email": "cccc" }
]}
编码:string json_encode ( $value [, $options = 0 ] )
解码:json_decode ($json_string [,$assoc = false [, $depth = 512 [, $options = 0 ]]])