class ConstantVisibilitySniff

class ConstantVisibilitySniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_CONST,
        ];
    }
    
    //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 = $phpcsFile->getTokens();
        // Make sure this is a class constant.
        if ($phpcsFile->hasCondition($stackPtr, Tokens::$ooScopeTokens) === false) {
            return;
        }
        $ignore = Tokens::$emptyTokens;
        $ignore[] = T_FINAL;
        $prev = $phpcsFile->findPrevious($ignore, $stackPtr - 1, null, true);
        if (isset(Tokens::$scopeModifiers[$tokens[$prev]['code']]) === true) {
            return;
        }
        $error = 'Visibility must be declared on all constants if your project supports PHP 7.1 or later';
        $phpcsFile->addWarning($error, $stackPtr, 'NotFound');
    }
    
    //end process()

}