src/Response/StreamReader.php
public function readBytes() {
        $binaryLength = $this->read(4);
        if ($binaryLength === "\xff\xff\xff\xff")
            return null;

        $length = unpack('N', $binaryLength)[1];
        return $length === 0 ? '' : $this->read($length);
    }
public function readBytes() {
        $binaryLength = $this->read(4);
        if ($binaryLength === "\xff\xff\xff\xff")
            return null;

        $length = unpack('N', $binaryLength)[1];
        return $length === 0 ? '' : $this->read($length);
    }
Read bytes.

@return string