下面由composer教學專欄為大家介紹composer require指定版本的方法，希望對需要的朋友有幫助！
預設
composer require endroid/qr-code
指定版本
composer require endroid/qr-code 1.9.3
# composer require endroid/qr-code 1.9.3 ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) Package operations: 0 installs, 1 update, 0 removals - Removing endroid/qr-code (2.5.1) - Installing endroid/qr-code (1.9.3): Downloading (100%) The Process class relies on proc_open, which is not available on your PHP installation. The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems) Unzip with unzip command failed, falling back to ZipArchive class Writing lock file Generating autoload files
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