Endroid\QrCode\QrCode::getImage PHP Method

    public function getImage()
    {
        if (empty($this->image)) {
            $this->create();
        }
        return $this->image;
    }

 /**
  * process the blocktrail public keys and create qr codes for each one
  */
 protected function processBlocktrailPubKeys()
 {
     //create QR codes for each blocktrail pub key
     foreach ($this->blocktrailPublicKeys as $keyIndex => $key) {
         $qrCode = new QrCode();
         $qrCode->setText($key->key())->setSize(self::QR_CODE_SIZE - 20)->setPadding(10)->setErrorCorrection('high')->setForegroundColor(array('r' => 0, 'g' => 0, 'b' => 0, 'a' => 0))->setBackgroundColor(array('r' => 255, 'g' => 255, 'b' => 255, 'a' => 0))->setLabel("KeyIndex: " . $keyIndex . "    Path: " . $key->path())->setLabelFontSize(10);
         $this->blocktrailPubKeyQRs[] = array('keyIndex' => $keyIndex, 'path' => $key->path(), 'qr' => $qrCode->getDataUri(), 'qrImg' => $qrCode->getImage());
     }
 }