php请求okx接口获取比特币价格数据、k线数据

这是官方的要求
发起请求
所有REST私有请求头都必须包含以下内容：

This is an official request
to initiate a request
that all REST private requesters must include the following xff1a;

OK-ACCESS-KEY字符串类型的APIKey。

OK-ACCESS-KEY string type APIKey.

OK-ACCESS-SIGN使用HMAC SHA256哈希函数获得哈希值，再使用Base-64编码（请参阅签名）。

OK-ACCESS-SIGN uses the HMAC SHA256 Hashi function to obtain Hashi xff0c; again uses the Base-64 code xff08; see signature xff09;

OK-ACCESS-TIMESTAMP发起请求的时间（UTC），如：2020-12-08T09:08:57.715Z

OK-ACCESS-TIMESTAMP launch request time xff08; UTC） xff0c; e.g. xff1a; 2020-12-08T09:08:57.715Z

OK-ACCESS-PASSPHRASE您在创建API密钥时指定的Passphrase。

OK-ACCESS-PASSPHRASE, which you specified when creating the API key.

所有请求都应该含有application/json类型内容，并且是有效的JSON。

All requests should contain application/json type & #xff0c; and are valid JSON.

签名
生成签名

Sign
Generate signature

OK-ACCESS-SIGN的请求头是对timestamp + method + requestPath + body字符串（+表示字符串连接），以及SecretKey，使用HMAC SHA256方法加密，通过Base-64编码输出而得到的。

OK-ACCESS-SIGN's request header is Timestamp & #43; method & #43; requestPath & #43; body & #xff08; & #43; for string connections & #xff09; & #xff0c; and SecretKey & #xff0c; encrypted by HMAC SHA256 method xff0c; obtained through Base-64 coded output.

如：sign=CryptoJS.enc.Base64.stringify(CryptoJS.HmacSHA256(timestamp + ‘GET’ + ‘/api/v5/account/balance?ccy=BTC’, SecretKey))

e.g. xff1a; sign= CryptoJS.enc. Base64.stringify (CryptoJS. HmacSHA256 (timestamp & #43; `GET' & #43; `api/v5/acaccount/balance?ccy= BTC', SecretKey))

其中，timestamp的值与OK-ACCESS-TIMESTAMP请求头相同，为ISO格式，如2020-12-08T09:08:57.715Z。

Of which xff0c; Timestamp has the same value as OK-ACCESS-TIMESTAMP request head xff0c; is ISO format xff0c; e.g. 2020-12-08T09:08:57.715Z.

method是请求方法，字母全部大写：GET/POST。

Method is the request method xff0c; all letters capitalise xff1a; GET/POST.

requestPath是请求接口路径。如：/api/v5/account/balance

requestPath is the path to the request interface. e.g. & #xff1a;/api/v5/account/balance

body是指请求主体的字符串，如果请求没有主体（通常为GET请求）则body可省略。如：{“instId”:“BTC-USDT”,“lever”:“5”,“mgnMode”:“isolated”}

body means the string & #xff0c of the subject of the request; if there is no subject & #xff08; usually request & #xff09 for GET; and body can be omitted. e.g. & #xff1a; {InstID: {BTC-USDT" ), "lever": 5, "mgnMode":isolated}