Well, I have made the PHP page which looks like this:
$raw_post = file_get_contents("php://info");
$json = json_decode($raw_post);
echo($json['Test']);
and the Lua script which is:
local s = game:GetService("HttpService");
local info = {
Test = "Hello";
}
local json = s:JSONEncode(info);
local data = s:PostAsync("http://teamclarity.co/test.php", json);
while wait() do
print(data)
end
But it does not work and doesn't change my website's content.
Could you please help?

2 comments
Does it work when you post to the site from outside of Roblox? If not then it isn't Roblox.
Only approved sites can be used with HTTPService.