class GlobalKeywordSniff

class GlobalKeywordSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_GLOBAL,
        ];
    }
    
    //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();
        $nextVar = $tokens[$phpcsFile->findNext([
            T_VARIABLE,
        ], $stackPtr)];
        $varName = str_replace('$', '', $nextVar['content']);
        $error = 'Use of the "global" keyword is forbidden; use "$GLOBALS[\'%s\']" instead';
        $data = [
            $varName,
        ];
        $phpcsFile->addError($error, $stackPtr, 'NotAllowed', $data);
    }
    
    //end process()

}