I'm trying to define constant in an helper of my module :

here's my Data.php :

class Data extends AbstractHelper
    const base = "my/url";   

    public function getBase(){
        return $this->scopeConfig->getValue(


And my block, I create a function to get my constant :

public function getBaseAPIT(){
   return $this->_helper->getBase();

But the result of getBaseAPIT() is null. Where am I wrong ?

PS : to do this, I've follow that https://www.maximehuran.fr/creer-un-helper-sous-magento-2/

  • Can you please add in your question your database row which value you want to display. – Rutvee Sojitra Jul 18 '18 at 12:54
  • I want to display the value of the constant "base". "base" is my custom url, and I want to add it as the constant, so that i can access it from everywhere – Morgan Tartreau Jul 18 '18 at 12:56
  • As per your logic It will return from core_config_data table row which have path value ""my/url" So i please check that this value is not null in your database – Rutvee Sojitra Jul 18 '18 at 13:00
  • I don't have this line in my database. How do I add it ? – Morgan Tartreau Jul 18 '18 at 13:03
  • @Morgan Tartreau first you need to added entry in your database in core_config_data. – Dharmendra Jadav Jul 18 '18 at 13:44

For set to constant as per your logic need my/url value in database: add like below example:

      INSERT INTO `core_config_data` (`config_id`, `scope`, `scope_id`, 
      `path`, `value`) VALUES ('53069', 'default', '0', 'my/url', 

then you will get www.example.com by calling this function getBaseAPIT() }

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