In my plugin I created a new table 'myapp_staging' made of three columns: 'id', 'id_api_call' and 'f24_options_value'. In the last field I would like to save a response to my Api call in json format.

I created a new field, the path of this is Vendor\MyApp\Block\System\Config\FieldModelli.php

here below the code:


namespace Vendor\MyApp\Block\System\Config;

use Magento\Framework\Data\Form\Element\AbstractElement;

class F24Modelli extends \Magento\Config\Block\System\Config\Form\Field
    protected $objectManager;
    public function __construct
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Framework\ObjectManagerInterface $objectManager,
        \Fattura24\AppFatturazione\Helper\Data $helper,
        array $data = []
        $this->objectManager = $objectManager;
        $this->helper = $helper;
        parent::__construct($context, $data);

    public function render(AbstractElement $element)
        return parent::render($element);

    protected function _getElementHtml(AbstractElement $element)
       return $this->F24Modelli();

    public function F24Modelli()
        $storeId = (int) $this->getRequest()->getParam('store', 0);
        $apiKey = $this->helper->getConfig('myApp/generali/api_key', $storeId);
        $templates_res = $this->helper->apiCall('https://www.app.myapp.com/api/v0.3/GetTemplate', $apiKey);
        //$templates_xml = simplexml_load_string($templates_res);
        $templates_xml = simplexml_load_string($templates_res, 'SimpleXMLElement', LIBXML_NOCDATA);
        $json_templates = json_encode($templates_xml);
        $resource = $this->objectManager->get('Magento\Framework\App\ResourceConnection');
        $connection = $resource->getConnection();
        $tableName = $resource->getTableName('myapp_staging');
        $select = "select * from $tableName where id_api_call='1'";
        $tem_result = $connection->fetchAll($select);
        if (count($tem_result) == 0) {
            $insert = "insert into $tableName set id_api_call='1',f24_options_value='$json_templates'";
        } else {
            $update = "update $tableName set id_api_call='1',f24_options_value='$json_templates'";
        return htmlspecialchars($json_templates);

first I tried to read xml in this way:

$templates_xml = simplexml_load_string($templates_res);

then I encode the response in json and succeed in saving data in my table.

In my original xml object I have got some tags inside <[!CData[]]> nodes and I need the content of these nodes, so I tried this:

 $templates_xml = simplexml_load_string($templates_res, 'SimpleXMLElement', LIBXML_NOCDATA);

And then I encode the result in json format. Now after that I'm not more able to save my 'complete' json result in the table.

Anyone could help me?


1 Answer 1


At last I found my json string was not valid, I succeeded in db saving after doing some lint programmatically (by str_replace method and similar)

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