I see an element in the $_SERVER
array called HTTP_X_CLIENT_DATA
- $_SERVER['HTTP_X_CLIENT_DATA']
, and its value looks like some kind of base64-encoded string. What is this element used for?
Here is an example value, which I tried decoding but seems to be also encrypted?
CJa2yQEIprbJAQjBtskBCPqcygEIqZ3KAQ==
It appears to be both uncommon and non-standard. Here's a List of HTTP Header Fields.