I am trying to get the value of system.xml from a plugin I am developing.

 <field id="Moduleposition" translate="Module" type="multiselect" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="1">
                    <label>Seleccionar tienda</label>

From the following function I am initially trying to return a test value to show it inside an alert

 public function getSelectStore()
        return "probando";

I am trying to display the return of this variable within a .phtml file using Jquery.

 alert('<?php echo $block->getSelectStore(); ?>'); 
  • Can you please elaborate more about config and system. Do you have multiple store?
    – Ankit
    Mar 2, 2022 at 2:52
  • No, I need to retrieve the selected value of the field that is selected in a .phtml file Mar 2, 2022 at 15:35

2 Answers 2


Try this


namespace Vendor\Module\Helper;

use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\App\Helper\AbstractHelper;
use Magento\Store\Model\ScopeInterface;
use Magento\Store\Model\StoreManagerInterface;

class Data extends AbstractHelper
    const XML_PATH_MODULE_CONFIG = 'section_id/group_id/field_id';

    public $_storeManager;
    public function __construct(
        StoreManagerInterface $storeManager,
        ScopeConfigInterface $scopeConfig
    ) {
        $this->_storeManager = $storeManager;
        $this->scopeConfig = $scopeConfig;

    public function getConfigValue($field, $storeId = null)
        return $this->scopeConfig->getValue(

    public function getConfig($storeId = null)
        return $this->getConfigValue(self::XML_PATH_MODULE_CONFIG, $storeId);

Please find answer below as I assume you did not frame your question correctly.

$(document).ready(function(){ $('select[name="slider_details[slider_location]"]').change(function(){ alert( this.value ); }); });

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