diff --git a/README-zh.md b/README-zh.md
index 2a26b1565..11fbe4e65 100755
--- a/README-zh.md
+++ b/README-zh.md
@@ -43,9 +43,12 @@ static-php-cli（简称 `spc`）有许多特性：
 
 如果你不想自行编译 PHP，可以从本项目现有的示例 Action 下载 Artifact，也可以从自托管的服务器下载。
 
-- [扩展组合 - common](https://dl.static-php.dev/static-php-cli/common/)：common 组合包含了约 [30+](https://dl.static-php.dev/static-php-cli/common/README.txt) 个常用扩展，体积为 22MB 左右。
-- [扩展组合 - bulk](https://dl.static-php.dev/static-php-cli/bulk/)：bulk 组合包含了 [50+](https://dl.static-php.dev/static-php-cli/bulk/README.txt) 个扩展，体积为 70MB 左右。
-- [扩展组合 - minimal](https://dl.static-php.dev/static-php-cli/minimal/)：minimal 组合包含了 [5](https://dl.static-php.dev/static-php-cli/minimal/README.txt) 个扩展，体积为 6MB 左右。
+- [扩展组合 - common](https://dl.static-php.dev/static-php-cli/common/)：common 组合包含了约 [30+](https://dl.static-php.dev/static-php-cli/common/README.txt) 个常用扩展，体积为 7.5MB 左右。
+- [扩展组合 - bulk](https://dl.static-php.dev/static-php-cli/bulk/)：bulk 组合包含了 [50+](https://dl.static-php.dev/static-php-cli/bulk/README.txt) 个扩展，体积为 25MB 左右。
+- [扩展组合 - minimal](https://dl.static-php.dev/static-php-cli/minimal/)：minimal 组合包含了 [5](https://dl.static-php.dev/static-php-cli/minimal/README.txt) 个扩展，体积为 3MB 左右。
+
+> Linux 和 Windows 默认启用了 UPX 压缩，可减小 30~50% 的 PHP 二进制体积。
+> macOS 当前不支持 UPX，所以上述预编译的 macOS 版本体积可能较大。
 
 对于 Windows 系统，目前支持的扩展较少，故仅提供 SPC 自身运行的最小扩展组合的 `cli` 和 `micro`：[扩展组合 - spc-min](https://dl.static-php.dev/static-php-cli/windows/spc-min/)。
 
diff --git a/README.md b/README.md
index 7d423681b..91e8953c6 100755
--- a/README.md
+++ b/README.md
@@ -49,9 +49,12 @@ If you don't want to build or want to test first, you can download example pre-c
 Below are several precompiled static-php binaries with different extension combinations,
 which can be downloaded directly according to your needs.
 
-- [Extension-Combination - common](https://dl.static-php.dev/static-php-cli/common/): `common` contains about [30+](https://dl.static-php.dev/static-php-cli/common/README.txt) commonly used extensions, and the size is about 22MB.
-- [Extension-Combination - bulk](https://dl.static-php.dev/static-php-cli/bulk/): `bulk` contains [50+](https://dl.static-php.dev/static-php-cli/bulk/README.txt) extensions and is about 70MB in size.
-- [Extension-Combination - minimal](https://dl.static-php.dev/static-php-cli/minimal/): `minimal` contains [5](https://dl.static-php.dev/static-php-cli/minimal/README.txt) extensions and is about 6MB in size.
+- [Extension-Combination - common](https://dl.static-php.dev/static-php-cli/common/): `common` contains about [30+](https://dl.static-php.dev/static-php-cli/common/README.txt) commonly used extensions, and the size is about 7.5MB.
+- [Extension-Combination - bulk](https://dl.static-php.dev/static-php-cli/bulk/): `bulk` contains [50+](https://dl.static-php.dev/static-php-cli/bulk/README.txt) extensions and is about 25MB in size.
+- [Extension-Combination - minimal](https://dl.static-php.dev/static-php-cli/minimal/): `minimal` contains [5](https://dl.static-php.dev/static-php-cli/minimal/README.txt) extensions and is about 3MB in size.
+
+> Linux and Windows supports UPX compression for binaries, which can reduce the size of the binary by 30% to 50%.
+> macOS does not support UPX compression, so the size of the pre-built binaries for mac is larger.
 
 For Windows systems, there are currently fewer extensions supported, 
 so only `cli` and `micro` that run the minimum extension combination of SPC itself are provided: [Extension-Combination - spc-min](https://dl.static-php.dev/static-php-cli/windows/spc-min/).
diff --git a/src/SPC/command/SwitchPhpVersionCommand.php b/src/SPC/command/SwitchPhpVersionCommand.php
new file mode 100644
index 000000000..ac5ae01fa
--- /dev/null
+++ b/src/SPC/command/SwitchPhpVersionCommand.php
@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\command;
+
+use SPC\store\Config;
+use SPC\store\Downloader;
+use SPC\store\FileSystem;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputOption;
+
+#[AsCommand('switch-php-version', description: 'Switch downloaded PHP version')]
+class SwitchPhpVersionCommand extends BaseCommand
+{
+    public function configure()
+    {
+        $this->addArgument(
+            'php-major-version',
+            InputArgument::REQUIRED,
+            'PHP major version (supported: 7.4, 8.0, 8.1, 8.2, 8.3)',
+            null,
+            fn () => ['7.4', '8.0', '8.1', '8.2', '8.3']
+        );
+        $this->no_motd = true;
+
+        $this->addOption('retry', 'R', InputOption::VALUE_REQUIRED, 'Set retry time when downloading failed (default: 0)', '0');
+    }
+
+    public function handle(): int
+    {
+        $php_ver = $this->input->getArgument('php-major-version');
+        if (!in_array($php_ver, ['7.4', '8.0', '8.1', '8.2', '8.3'])) {
+            $this->output->writeln('<error>Invalid PHP major version ' . $php_ver . ' !</error>');
+            return static::FAILURE;
+        }
+
+        // detect if downloads/.lock.json exists
+        $lock_file = DOWNLOAD_PATH . '/.lock.json';
+        // parse php-src part of lock file
+        $lock_data = json_decode(file_get_contents($lock_file), true);
+        // get php-src downloaded file name
+        $php_src = $lock_data['php-src'];
+        $file = DOWNLOAD_PATH . '/' . ($php_src['filename'] ?? '.donot.delete.me');
+        if (file_exists($file)) {
+            $this->output->writeln('<info>Removing old PHP source...</info>');
+            unlink($file);
+        }
+
+        // Download new PHP source
+        $this->output->writeln('<info>Downloading PHP source...</info>');
+        define('SPC_BUILD_PHP_VERSION', $php_ver);
+
+        // retry
+        $retry = intval($this->getOption('retry'));
+        f_putenv('SPC_RETRY_TIME=' . $retry);
+
+        Downloader::downloadSource('php-src', Config::getSource('php-src'));
+
+        // Remove source/php-src dir
+        FileSystem::removeDir(SOURCE_PATH . '/php-src');
+
+        $this->output->writeln('<info>Switched to PHP ' . $php_ver . ' successfully!</info>');
+        return static::SUCCESS;
+    }
+}