laravel 如何恢复作曲家更新？
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How to revert back composer update?
提问by John Mccandles
Today I ran composer updateand the update broke my site completely. I found in the php.log the following information:
今天我跑composer update了，更新完全破坏了我的网站。我在 php.log 中找到了以下信息：
72.15.153.139 - - [11/Nov/2015:21:01:45 -0500] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0" [Wed Nov 11 21:01:48 2015] [error] [client 127.7.179.129] PHP Parse error: syntax error, unexpected 'function' (T_FUNCTION), expecting identifier (T_STRING) or \\ (T_NS_SEPARATOR) in /var/lib/openshift/55c481747628e14556000188/app-root/runtime/repo/config/vendor/danielstjules/stringy/tests/CreateTest.php on line 5 72.15.153.139 - - [11/Nov/2015:21:01:48 -0500] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0"
72.15.153.139 - - [11/Nov/2015:21:01:45 -0500] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/201000 Firefox/42.0" [2015 年 11 月 11 日星期三 21:01:48] [错误] [客户端 127.7.179.129] PHP 解析错误：语法错误，意外的“函数”（T_FUNCTION），需要标识符（T_STRING）或 \\（T_NS_SEPARATOR）在 /var/lib/openshift/55c481747628e14556000188/app-root/runtime/repo/config/vendor/danielstjules/stringy/tests/CreateTest.php 中第 5 行 72.15.153.139 - - [11/Nov/2011 48 -0500] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0"
Seems that "danielstjules/stringy" is the one to blame. But how can I revert back to an older version (or using a news version?) of this package? I tried to modify composer.lock file, and changed
似乎“danielstjules/stringy”是罪魁祸首。但是我怎样才能恢复到这个包的旧版本（或使用新闻版本？）？我试图修改 composer.lock 文件，并更改
"require": {
"danielstjules/stringy": "~1.8",
to
到
"require": {
"danielstjules/stringy": "~1.9",
and run composer updateagain, but it gave the information:
并composer update再次运行，但它提供了信息：
Loading composer repositories with package information Updating dependencies (including require-dev) Nothing to install or update Writing lock file Generating autoload files PHP Parse error: syntax error, unexpected 'function' (T_FUNCTION), expecting identifier (T_STRING) or \ (T_NS_SEPARATOR) in /var/lib/openshift/55c481747628e14556000188/app-root/runtime/repo/config/vendor/danielstjules/stringy/tests/CreateTest.php on line 5 Script php artisan clear-compiled handling the post-update-cmd event returned with an error
[RuntimeException] Error Output: PHP Parse error: syntax error, unexpected 'function' (T_FUNC TION), expecting identifier (T_STRING) or \ (T_NS_SEPARATOR) in /var/lib/o penshift/55c481747628e14556000188/app-root/runtime/repo/config/vendor/danie lstjules/stringy/tests/CreateTest.php on line 5
使用包信息加载 Composer 存储库 更新依赖项（包括 require-dev） 无需安装或更新 编写锁定文件 生成自动加载文件 PHP 解析错误：语法错误，意外的“函数”（T_FUNCTION），需要标识符（T_STRING）或 \（T_NS_SEPARATOR）在 /var/lib/openshift/55c481747628e14556000188/app-root/runtime/repo/config/vendor/danielstjules/stringy/tests/CreateTest.php 中的第 5 行脚本 php artisan clear-compiled 处理返回的 post-update-cmd 事件一个错误
[RuntimeException] 错误输出：PHP 解析错误：语法错误，意外的“函数”（T_FUNC TION），在 /var/lib/o penshift/55c481747628e14556000188/app-root/runtime/repo 中需要标识符（T_STRING）或 \（T_NS_SEPARATOR） /config/vendor/danie lstjules/stringy/tests/CreateTest.php 第 5 行
How can I rollback this package? Thanks.
我怎样才能回滚这个包？谢谢。
EDIT 2:
编辑2：
composer installwill modify composer.lockautomatically. I modified composer.jsoninstead, and it fetched the old version 1.8 successfully.
composer install会composer.lock自动修改。我composer.json改为修改，它成功获取了旧版本 1.8。
But the build still failed. This issue descriptionhad the reason. But after I rm -rf test/, the problem was still there.
但是构建仍然失败。这个问题描述是有原因的。但是在我之后rm -rf test/，问题仍然存在。
EDIT 3:
编辑 3：
I tried the following:
我尝试了以下方法：
rm -rf vendor/composer update
rm -rf vendor/composer update
The problem was gone.
问题就解决了。
采纳答案by morphatic
If you check the composer version specification documentation, the ~operator gets the latest version that is backwards-compatible according the principles of semantic versioning. That means that ~1.8is equivalent to >=1.8 <2.0.0and likewise ~1.9is the same as >=1.9 <2.0.0. In other words, ~1.8will return the SAME THING as ~1.9if the latest version is >=1.9. If you really want to use version 1.8, just do this:
如果您查看Composer 版本规范文档，~操作员将获得根据语义版本控制原则向后兼容的最新版本。这意味着~1.8等价于>=1.8 <2.0.0并且同样~1.9与 相同>=1.9 <2.0.0。换句话说，~1.8将返回相同的东西，就~1.9好像最新版本是>=1.9. 如果您真的想使用 version 1.8，请执行以下操作：
"danielstjules/stringy": "1.8",
That will get EXACTLY version 1.8. Of course you'll need to run composer updateafterwards.
那将得到 EXACTLY 版本1.8。当然，你需要在composer update之后运行。
I find the composer versioning syntax tricky to remember myself.
我发现 Composer 版本控制语法很难记住自己。
回答by Sven
How to revert an update? Easy: Restore the composer.lockfile from your version control system that was used before you updated.
如何恢复更新？简单：composer.lock从更新前使用的版本控制系统恢复文件。
The composer.lockexactly records which software was installed. So it is paramount to commit this file into version control in order to be able to go back to a working version in case of update failure.
在composer.lock安装该软件，准确的记录。因此，最重要的是将此文件提交到版本控制中，以便在更新失败的情况下能够返回到工作版本。
Running composer installwill always install the software versions recorded in composer.lock, it will only act like updateif this file is not present.
运行composer install将始终安装 中记录的软件版本composer.lock，仅update当此文件不存在时才会起作用。
