How to fix the «Invalid template file» / «require_js.phtml» failure of Magento 2.3.x in Windows?

go to this file


replace this part

foreach ($directories as $directory) {
    if (0 === strpos($realPath, $directory)) {

with the following one:

$isWin = 'WIN' === strtoupper(substr(PHP_OS, 0, 3)); 

/** @var bool $isWin */ 
foreach ($directories as $directory) { 
    if (0 === strpos($realPath, !$isWin ? $directory : $this->fileDriver->getRealPath($directory)) ) {


Original article 

How do I clear the cache in Magento 2 for a single product_id

the best way to do do this is using the below method

$objectManager =   \Magento\Framework\App\ObjectManager::getInstance();
$productR =      $objectManager ->create('\Magento\Catalog\Api\ProductRepositoryInterface');
$product = $productR->get('product_sku');
$this->_eventManager->dispatch('clean_cache_by_tags', ['object' => $product]);

you need of course to follow the DI to implement this code, I just used this quick way to make it easy to understand


Programmatically update customer data in Magento 2

Using Object Manager

$storeManager = $objectManager->get('\Magento\Store\Model\StoreManagerInterface');
$websiteId = $storeManager->getStore()->getWebsiteId();
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$customerRepository = $objectManager->create('Magento\Customer\Api\CustomerRepositoryInterface');
// load customer info by email
$customer = $customerRepository->get('[email protected]', $websiteId);
// load customer info by id    
$customer = $customerRepository->getById(1);
// Update customer Info

How to enable Magento 2 profiler?

Magento profiler can help you with the store performance tuning before the store release or during the exploitation.
The old UI for enabling/disabling the profiler is not available in Magento 2 and the profiler is disabled by default.
To enable one of the profiler formats mentioned above, you can edit .htaccess (a configuration file for Apache Web Server software):

    Choose one of the next expressions:

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