class GlobalFunctionSniff

class GlobalFunctionSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_FUNCTION,
        ];
    }
    
    //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 = $phpcsFile->getTokens();
        if (empty($tokens[$stackPtr]['conditions']) === true) {
            $functionName = $phpcsFile->getDeclarationName($stackPtr);
            if ($functionName === null) {
                return;
            }
            // Special exception for __autoload as it needs to be global.
            if ($functionName !== '__autoload') {
                $error = 'Consider putting global function "%s" in a static class';
                $data = [
                    $functionName,
                ];
                $phpcsFile->addWarning($error, $stackPtr, 'Found', $data);
            }
        }
    }
    
    //end process()

}