class InterfaceNameSuffixSniff

class InterfaceNameSuffixSniff implements Sniff {
    
    /**
     * Registers the tokens that this sniff wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_INTERFACE,
        ];
    }
    
    //end register()
    
    /**
     * Processes this sniff, 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) {
        $interfaceName = $phpcsFile->getDeclarationName($stackPtr);
        if ($interfaceName === null) {
            // Live coding or parse error. Bow out.
            return;
        }
        $suffix = substr($interfaceName, -9);
        if (strtolower($suffix) !== 'interface') {
            $phpcsFile->addError('Interface names must be suffixed with "Interface"; found "%s"', $stackPtr, 'Missing', [
                $interfaceName,
            ]);
        }
    }
    
    //end process()

}