snippet.php

if (str_contains($file_content, '<?')) {
      // If found write this to the log for later reporting
      error_log("Some hackers tried to upload code to our server. Pls check if we were compromised");
      // Overwrite the offending file with a warning to the hackers.
      $uploaded_file = fopen($target_file, "w");
      fwrite($uploaded_file, "Nice try hackers!");