class RemoteAddressSniff

class RemoteAddressSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_VARIABLE,
        ];
    }
    
    //end register()
    
    /**
     * Processes this test, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The current file being processed.
     * @param int                         $stackPtr  The position of the current token
     *                                               in the stack passed in $tokens.
     *
     * @return void
     */
    public function process(File $phpcsFile, $stackPtr) {
        $string = $phpcsFile->getTokensAsString($stackPtr, 4);
        $startOfStatement = $phpcsFile->findStartOfStatement($stackPtr);
        if (($string === '$_SERVER["REMOTE_ADDR"]' || $string === '$_SERVER[\'REMOTE_ADDR\']') && $stackPtr !== $startOfStatement) {
            $error = 'Use ip_address() or Drupal::request()->getClientIp() instead of $_SERVER[\'REMOTE_ADDR\']';
            $phpcsFile->addError($error, $stackPtr, 'RemoteAddress');
        }
    }
    
    //end process()

}