class FunctionDefinition

abstract class FunctionDefinition implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_STRING,
        ];
    }
    
    //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();
        // Check if this is a function definition.
        $functionPtr = $phpcsFile->findPrevious(Tokens::$emptyTokens, $stackPtr - 1, null, true);
        if ($tokens[$functionPtr]['code'] === T_FUNCTION) {
            $this->processFunction($phpcsFile, $stackPtr, $functionPtr);
        }
    }
    
    //end process()
    
    /**
     * Process this function definition.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile   The file being scanned.
     * @param int                         $stackPtr    The position of the function name in the stack.
     *                                                 name in the stack.
     * @param int                         $functionPtr The position of the function keyword in the stack.
     *                                                 keyword in the stack.
     *
     * @return void
     */
    public abstract function processFunction(File $phpcsFile, $stackPtr, $functionPtr);

}