composer require如何指定版本

下面由composer教程栏目给大家介绍composer require指定版本的方法，希望对需要的朋友有所帮助！
默认
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 updatedloading composer repositories with package informationupdating 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 classwriting lock filegenerating autoload files

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