yii\console\controllers\BaseMigrateController::actionUp PHP Method

    public function actionUp($limit = 0)
    {
        $migrations = $this->getNewMigrations();
        if (empty($migrations)) {
            $this->stdout("No new migrations found. Your system is up-to-date.\n", Console::FG_GREEN);
            return self::EXIT_CODE_NORMAL;
        }
        $total = count($migrations);
        $limit = (int) $limit;
        if ($limit > 0) {
            $migrations = array_slice($migrations, 0, $limit);
        }
        $n = count($migrations);
        if ($n === $total) {
            $this->stdout("Total {$n} new " . ($n === 1 ? 'migration' : 'migrations') . " to be applied:\n", Console::FG_YELLOW);
        } else {
            $this->stdout("Total {$n} out of {$total} new " . ($total === 1 ? 'migration' : 'migrations') . " to be applied:\n", Console::FG_YELLOW);
        }
        foreach ($migrations as $migration) {
            $this->stdout("\t{$migration}\n");
        }
        $this->stdout("\n");
        $applied = 0;
        if ($this->confirm('Apply the above ' . ($n === 1 ? 'migration' : 'migrations') . '?')) {
            foreach ($migrations as $migration) {
                if (!$this->migrateUp($migration)) {
                    $this->stdout("\n{$applied} from {$n} " . ($applied === 1 ? 'migration was' : 'migrations were') . " applied.\n", Console::FG_RED);
                    $this->stdout("\nMigration failed. The rest of the migrations are canceled.\n", Console::FG_RED);
                    return self::EXIT_CODE_ERROR;
                }
                $applied++;
            }
            $this->stdout("\n{$n} " . ($n === 1 ? 'migration was' : 'migrations were') . " applied.\n", Console::FG_GREEN);
            $this->stdout("\nMigrated up successfully.\n", Console::FG_GREEN);
        }
    }