Method newFrame

text-to-qr/lib/phpqrcode/qrspec.php:554–579

----------------------------------------------------------------------

($version)

        
        //----------------------------------------------------------------------
        public static function newFrame($version)
        {
            if($version < 1 || $version > QRSPEC_VERSION_MAX) 
                return null;

            if(!isset(self::$frames[$version])) {
                
                $fileName = QR_CACHE_DIR.'frame_'.$version.'.dat';
                
                if (QR_CACHEABLE) {
                    if (file_exists($fileName)) {
                        self::$frames[$version] = self::unserial(file_get_contents($fileName));
                    } else {
                        self::$frames[$version] = self::createFrame($version);
                        file_put_contents($fileName, self::serial(self::$frames[$version]));
                    }
                } else {
                    self::$frames[$version] = self::createFrame($version);
                }
            }
            
            if(is_null(self::$frames[$version]))
                return null;

            return self::$frames[$version];
        }

        //----------------------------------------------------------------------
        public static function rsBlockNum($spec)     { return $spec[0] + $spec[3]; }