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Drupal 9 – print a variable from custom module

I’ve created a custom module. In the file my_module.module file I have a function my_module_api_clear_cache. In that function, I’ve got some variables that I’d like to print and see what I have for example $client or $request

function my_module_api_clear_cache() {   $client= Drupal::httpClient();      try {     $request = $client->get($url);     $status = $request->getStatusCode();     $file_contents = $request->getBody()->getContents();   }   catch (RequestException $e) {     //An error happened.   } }
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Drupal 9 – print a variable from custom module

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