Proper way to get config values in overridden template in Magento 2

Question

I need to get theme's Default Title configuration value in my logo.phtml.

So after many searches, I'm using a bad way for do that! I'm using the Object Manager Instance directly in template file!

app\design\frontend\MyVendor\myTheme\Magento_Theme\templates\html\header\logo.phtml:

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$_pageConfig = $objectManager->get('Magento\Framework\View\Page\Config');
$_metaTitle = strip_tags($_pageConfig->getTitle()->getDefault());

And it works!

But how can I get anything from Configuration Values in overridden templates in proper way like Block Class or Layout stuff?!

By the way, I'm using Magento v2.1.9 with PHP 7.0.24.

Answer 1

You should use Dependency Injection instead of Object Manager Instance. To do so, you should create a new module to extend the core block, then use it inside template.

1. I assume you know how to create a module. If not, refer to here. The name of module is MyVendor_MyModule in my example.

2. After creating the basic module structure, create file di.xml under app/code/MyVendor/MyModule/etc with the following content:

   <?xml version="1.0"?>
   <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
       <preference for="Magento\Theme\Block\Html\Header\Logo" type="MyVendor\MyModule\Block\Logo" />
   </config> 
   

3. Create file Logo.php under app/code/MyVendor/MyModule/Block with the following content:

   <?php
   
   namespace MyVendor\MyModule\Block;
   
   use \Magento\Theme\Block\Html\Header\Logo as Core_Logo;
   use \Magento\Framework\View\Element\Template\Context;
   use \Magento\MediaStorage\Helper\File\Storage\Database;
   use \Magento\Framework\View\Page\Config;
   
   class Logo extends Core_Logo
   {
   
       protected $config;
   
       public function __construct(
           Context $context,
           Database $fileStorageHelper,
           array $data = [],
           Config $config
       ) {
           parent::__construct($context, $fileStorageHelper, $data);
           $this->config = $config;
       }
   
       public function getTitle(){               
           return strip_tags($this->config->getTitle()->getDefault());
       }
   }
   

4. Enable the module

5. As we created a new function getTitle(), apply it into your template app\design\frontend\MyVendor\myTheme\Magento_Theme\templates\html\header\logo.phtml using the following code:

       <?php echo $block->getTitle(); ?>
   

More Ref.: How to override blocks in v2.1