yii\helpers\BaseConsole::updateProgress PHP 메소드

    public static function updateProgress($done, $total, $prefix = null)
    {
        $width = self::$_progressWidth;
        if ($width === false) {
            $width = 0;
        } else {
            $screenSize = static::getScreenSize(true);
            if ($screenSize === false && $width < 1) {
                $width = 0;
            } elseif ($width === null) {
                $width = $screenSize[0];
            } elseif ($width > 0 && $width < 1) {
                $width = floor($screenSize[0] * $width);
            }
        }
        if ($prefix === null) {
            $prefix = self::$_progressPrefix;
        } else {
            self::$_progressPrefix = $prefix;
        }
        $width -= static::ansiStrlen($prefix);
        $percent = $total == 0 ? 1 : $done / $total;
        $info = sprintf('%d%% (%d/%d)', $percent * 100, $done, $total);
        if ($done > $total || $done == 0) {
            self::$_progressEta = null;
            self::$_progressEtaLastUpdate = time();
        } elseif ($done < $total) {
            // update ETA once per second to avoid flapping
            if (time() - self::$_progressEtaLastUpdate > 1 && $done > self::$_progressEtaLastDone) {
                $rate = (time() - (self::$_progressEtaLastUpdate ?: self::$_progressStart)) / ($done - self::$_progressEtaLastDone);
                self::$_progressEta = $rate * ($total - $done);
                self::$_progressEtaLastUpdate = time();
                self::$_progressEtaLastDone = $done;
            }
        }
        if (self::$_progressEta === null) {
            $info .= ' ETA: n/a';
        } else {
            $info .= sprintf(' ETA: %d sec.', self::$_progressEta);
        }
        // Number extra characters outputted. These are opening [, closing ], and space before info
        // Since Windows uses \r\n\ for line endings, there's one more in the case
        $extraChars = static::isRunningOnWindows() ? 4 : 3;
        $width -= $extraChars + static::ansiStrlen($info);
        // skipping progress bar on very small display or if forced to skip
        if ($width < 5) {
            static::stdout("\r{$prefix}{$info}   ");
        } else {
            if ($percent < 0) {
                $percent = 0;
            } elseif ($percent > 1) {
                $percent = 1;
            }
            $bar = floor($percent * $width);
            $status = str_repeat('=', $bar);
            if ($bar < $width) {
                $status .= '>';
                $status .= str_repeat(' ', $width - $bar - 1);
            }
            static::stdout("\r{$prefix}" . "[{$status}] {$info}");
        }
        flush();
    }