使用 Composer 从 Yii 2.0.x 升级时，报错：[ErrorException] Undefined variable: nameMatchesRequiredPackage 的分析解决
1、使用 Composer 从 Yii 2.0.x 升级时，报错： [ErrorException] Undefined variable: nameMatchesRequiredPackage，如图1
![使用 Composer 从 Yii 2.0.x 升级时，报错： [ErrorException] Undefined variable: nameMatchesRequiredPackage](https://www.shuijingwanwq.com/wp-content/uploads/2019/02/1.png)
图1
PS E:\wwwroot\github-shuijingwan-yii2-app-advanced> composer update yiisoft/yii2 yiisoft/yii2-composer bower-asset/jquer
y.inputmask
[ErrorException]
Undefined variable: nameMatchesRequiredPackage
update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock] [--no-custom-installers] [--no-autoload
er] [--no-scripts] [--no-progress] [--no-suggest] [--with-dependencies] [--with-all-dependencies] [-v|vv|vvv|--verbose]
[-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--ignore-platform-reqs] [--prefer-stable]
[--prefer-lowest] [-i|--interactive] [--root-reqs] [--] []...
2、更新 3 个包，先更新前 2 个，未报错，再更新第 3 个，报错，在当前项目搜索依赖包 bower-asset/jquery.inputmask，不存在，如图2
图2
PS E:\wwwroot\github-shuijingwan-yii2-app-advanced> composer update yiisoft/yii2 yiisoft/yii2-composer
Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Generating autoload files
PS E:\wwwroot\github-shuijingwan-yii2-app-advanced> composer update bower-asset/jquery.inputmask
[ErrorException]
Undefined variable: nameMatchesRequiredPackage
update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock] [--no-custom-installers] [--no-autoload
er] [--no-scripts] [--no-progress] [--no-suggest] [--with-dependencies] [--with-all-dependencies] [-v|vv|vvv|--verbose]
[-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--ignore-platform-reqs] [--prefer-stable]
[--prefer-lowest] [-i|--interactive] [--root-reqs] [--] []...
PS E:\wwwroot\github-shuijingwan-yii2-app-advanced> composer search bower-asset/jquery.inputmask
bower-asset/jquery.inputmask
PS E:\wwwroot\github-shuijingwan-yii2-app-advanced> composer search yiisoft/yii2-composer
yiisoft/yii2-composer The composer plugin for Yii extension installer
yiisoft/yii2-composer The composer plugin for Yii extension installer
3、查看 \vendor\yiisoft\yii2\composer.json 文件，bower-asset/jquery.inputmask 已经变更为 bower-asset/inputmask
"require": {
"php": ">=5.4.0",
"ext-mbstring": "*",
"ext-ctype": "*",
"lib-pcre": "*",
"yiisoft/yii2-composer": "~2.0.4",
"ezyang/htmlpurifier": "~4.6",
"cebe/markdown": "~1.0.0 | ~1.1.0",
"bower-asset/jquery": "3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable",
"bower-asset/inputmask": "~3.2.2 | ~3.3.5",
"bower-asset/punycode": "1.3.*",
"bower-asset/yii2-pjax": "~2.0.1"
},
4、在 Github 上查看此文件的提交日志，打开网址：https://github.com/yiisoft/yii2/commit/858e8015731da1af978af5e88eb495f3061fa120#diff-59858bca2a40c010f385eaa7b6f5137f ，如图3
图3
5、使用 Composer 从 Yii 2.0.x 升级时，调整命令，bower-asset/jquery.inputmask 变更为 bower-asset/inputmask，更新成功，不再报错，如图4
图4
PS E:\wwwroot\github-shuijingwan-yii2-app-advanced> composer update yiisoft/yii2 yiisoft/yii2-composer bower-asset/input
mask
Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Generating autoload files
