php://input can't obtain data normally

[sillenge]

Regarding the basic mode, when there is no = in the post, the data cannot be obtained,but raw mode can get it;

<?php var_dump(file_get_contents("php://input")); ?>

---

basic:

post body:123

respond:string(0) ""

---

raw:

POST / HTTP/1.1
Sec-Ch-Ua: "Google Chrome";v="131", "Chromium";v="131", "Not_A Brand";v="24"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: Windows
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br, zstd
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8

1123

respond:string(4) "1123"

[0140454]

This is known issue and no solution can be applied.

You can only use Raw mode to POST a payload without =.