text: <?php
  /**
   * Detects unnecessary final modifiers inside of final classes.
   *
   * This rule is based on the PMD rule catalog. The Unnecessary Final Modifier
   * sniff detects the use of the final modifier inside of a final class which
   * is unnecessary.
   *
   * <code>
   * final class Foo
   * {
   *     public final function bar()
   *     {
   *     }
   * }
   * </code>
   *
   * @author    Manuel Pichler <mapi@manuel-pichler.de>
   * @copyright 2007-2014 Manuel Pichler. All rights reserved.
   * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
   */
  
  namespace PHP_CodeSniffer\Standards\Generic\Sniffs\CodeAnalysis;
  
  use PHP_CodeSniffer\Sniffs\Sniff;
  use PHP_CodeSniffer\Files\File;
  use PHP_CodeSniffer\Util\Tokens;
  
  class UnnecessaryFinalModifierSniff implements Sniff
  {
  
  
      /**
       * Registers the tokens that this sniff wants to listen for.
       *
       * @return int[]
       */
      public function register()
      {
          return [T_CLASS];
  
      }//end register()
  
  
      /**
       * Processes this test, when one of its tokens is encountered.
       *
       * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
       * @param int                         $stackPtr  The position of the current token
       *                                               in the stack passed in $tokens.
       *
       * @return void
       */
      public function process(File $phpcsFile, $stackPtr)
      {
          $tokens = $phpcsFile->getTokens();
          $token  = $tokens[$stackPtr];
  
          // Skip for-statements without body.
          if (isset($token['scope_opener']) === false) {
              return;
          }
  
          // Fetch previous token.
          $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
  
          // Skip for non final class.
          if ($prev === false || $tokens[$prev]['code'] !== T_FINAL) {
              return;
          }
  
          $next = ++$token['scope_opener'];
          $end  = --$token['scope_closer'];
  
          for (; $next <= $end; ++$next) {
              if ($tokens[$next]['code'] === T_FINAL) {
                  $error = 'Unnecessary FINAL modifier in FINAL class';
                  $phpcsFile->addWarning($error, $next, 'Found');
              }
          }
  
      }//end process()
  
  
  }//end class
  