code: protected function applyFix(\SplFileInfo $file, Tokens $tokens)
      {
          $argumentsAnalyzer = new ArgumentsAnalyzer();
  
          $index = 0;
          $end = $tokens->count() - 1;
          while (true) {
              $candidate = $this->find('fopen', $tokens, $index, $end);
  
              if (null === $candidate) {
                  break;
              }
  
              $index = $candidate[1]; // proceed to '(' of `fopen`
  
              // fetch arguments
              $arguments = $argumentsAnalyzer->getArguments(
                  $tokens,
                  $index,
                  $candidate[2]
              );
  
              $argumentsCount = \count($arguments); // argument count sanity check
  
              if ($argumentsCount < 2 || $argumentsCount > 4) {
                  continue;
              }
  
              $argumentStartIndex = array_keys($arguments)[1]; // get second argument index
  
              $this->fixFopenFlagToken(
                  $tokens,
                  $argumentStartIndex,
                  $arguments[$argumentStartIndex]
              );
          }
      }
docs: {@inheritdoc}