CODEWITHSUNDEEP
phpstream
Manitoba
Manitoba

Reputation: 8702

Php - Copy Stream to itself

I'd like to perform an operation on the php://input stream but also return it.

For example, what I'd like to achieve is that:

php://input ==> OPERATION ==> php://input

Is that possible to make something like that ?

$input = fopen("php://input", "r");
$output = fopen("php://input", "w");
while (($buffer.= fgets($input, 1024)) !== false) {
  // Do something with that buffer
  // ??
  fwrite($output, $buffer);

}
fclose($output);
fclose($input);

Upvotes: 2

Views: 543

Answers (1)

hek2mgl
hek2mgl

Reputation: 158250

If you are fine with one of the operations supported as a filter in php, you can use the php://filter fopen wrapper.

Let's say you want to base64 decode the data for example:

$data = file_get_contents('php://filter/read=convert.base64-decode/resource=php://input');

Or:

$input = fopen('php://filter/read=convert.base64-decode/resource=php://input');
// now you can pass $input to somewhere and every read operation will 
// return base64 decoded data ...

However, the set of operations supported as a filter in PHP is quite limited. If it does not fit your needs I would suggest to wrap the file pointer, in a class maybe. Here comes a very basic example, you might add buffering, caching or whatever...

class Input {

    public static function read() {
        return $this->process(file_get_contents('php://stdin'));
    }


    public function process($data) {
        return do_whatever_with($data);
    }

}

Then in the application code use:

$input = Input::read();

Upvotes: 2

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