Hello @mraccine ,
If you are putting code direct in phtml that might need to work as per reference link given in question.
By putting this code in app/design/frontend/Theme/My_click_theme/Magento_catalog/templates/product/view/form.phtml
<?php
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$category = $objectManager->get('Magento\Framework\Registry')->registry('current_category');//get current category
echo $category->getId();
echo $category->getName();
?>
If you still getting issue, then I suggest to call separate phtml file using app/design/frontend/Theme/My_click_theme/Magento_Catalog/layout/catalog_product_view.xml
You can put following code in xml file.
<?xml version="1.0"?>
<page layout="1column" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
...
...
<referenceBlock name="page.main.title">
<block class="Magento\Catalog\Block\Product\View" name="product.category.block" template="Magento_Catalog::product/view/customcategory.phtml" after="-" />
</referenceBlock>
...
...
</body>
</page>
and in create new phtml file with name customcategory.phtml and add following code in app/design/frontend/Theme/My_click_theme/Magento_Catalog/templates/product/view/customcategory.phtml
<?php
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$category = $objectManager->get('Magento\Framework\Registry')->registry('current_category');//get current category
echo $category->getId();
echo $category->getName();
?>If this helps then Click on Kudos and Accept as Solution.
Thank you
Hiren Patel
