If you know the string is small use
$stream = fopen(sprintf('data://text/plain,%s', $string), 'r');
$result = stream_get_contents($stream);When passing plain string without base64 encoding, do not forget to pass the string through URLENCODE(), because PHP automatically urldecodes all entities inside passed string (and therefore all + get lost, all % entities will be converted to the corresponding characters).
If data is large - better use
$stream = fopen('php://temp', 'r+');
fwrite($stream, $string);
rewind($stream);
$result = stream_get_contents($stream);
Can use php://memory, but to avoid running out of memory php://temp better choise. It only uses a real file above a certain size. Below that it uses RAM.
You can use php://temp/maxmemory:4M.
Awesome right what I was searching for to get out of hazzle for a http-stream response in my php application using http-client request.