php如何以json格式传输图片的二进制形式

{"image":{},"session_id":"O:27:\"GuzzleHttp\Cookie\CookieJar\":2:{s:36:\"\u0000GuzzleHttp\Cookie\CookieJar\u0000cookies\";
a:1:{i:0;O:27:\"GuzzleHttp\Cookie\SetCookie\":1:{s:33:\"\u0000GuzzleHttp\Cookie\SetCookie\u0000data\";
a:9:{s:4:\"Name\";s:10:\"JSESSIONID\";
s:5:\"Value\";s:21:\"deaxSSQVARpvY5yOJiqXu\";
s:6:\"Domain\";s:15:\"202.119.113.135\";
s:4:\"Path\";
s:1:\"\/\";s:7:\"Max-Age\";
N;s:7:\"Expires\";
N;s:6:\"Secure\";
b:0;s:7:\"Discard\";
b:0;s:8:\"HttpOnly\";
b:0;}}}s:39:\"\u0000GuzzleHttp\Cookie\CookieJar\u0000strictMode\";
b:0;
}","error_code":0}