This library provide a lightweight class which allows substitute PHP streams. It's very useful for Unit Testing when you need to test a class which interact with files.
Stream class create an unique stream wrapper which redirect file system calls to instance of Stream class, making the process fully controllable.
Reading
$stream = new Stream("Content");
// This code use variable instead of using actual file
$fh = fopen($stream, "r");
echo fgets($fh); // output Content
fclose($fh);Writing
$stream = new Stream();
// This code write everything into variable
$fh = fopen($stream, "r");
fputs($fh, "Content");
fclose($fh);
// Now you can perform actions on generated content
echo $stream->getContent(); // output Content