Wrench\Socket\Socket::receive PHP Method

    public function receive($length = self::DEFAULT_RECEIVE_LENGTH)
    {
        $buffer = '';
        $metadata['unread_bytes'] = 0;
        do {
            // feof means socket has been closed
            // also, sometimes in long running processes the system seems to kill the underlying socket
            if (!$this->socket || feof($this->socket)) {
                $this->disconnect();
                return $buffer;
            }
            $result = fread($this->socket, $length);
            // fread FALSE means socket has been closed
            if ($result === false) {
                $this->disconnect();
                return $buffer;
            }
            $buffer .= $result;
            // feof means socket has been closed
            if (feof($this->socket)) {
                $this->disconnect();
                return $buffer;
            }
            $continue = false;
            if ($this->firstRead == true && strlen($result) == 1) {
                // Workaround Chrome behavior (still needed?)
                $continue = true;
            }
            $this->firstRead = false;
            if (strlen($result) == $length) {
                $continue = true;
            }
            // Continue if more data to be read
            $metadata = stream_get_meta_data($this->socket);
            if ($metadata && isset($metadata['unread_bytes']) && $metadata['unread_bytes']) {
                $continue = true;
                $length = $metadata['unread_bytes'];
            }
        } while ($continue);
        return $buffer;
    }