Php 安装laravel依赖项时遇到的问题 *我正在运行Windows10。 我打开cmd并键入： 编写器创建项目laravel/laravel**项目名称** 我在cmd中获得以下行： 您正在运行禁用SSL/TLS保护的Composer。 使用包信息加载composer存储库

但看起来一切都很好，文件夹结构也很正确

然后我键入以下命令以下载我的所有依赖项[vendor dir]： 编写器安装 我在cmd中得到以下几行： 您正在运行禁用SSL/TLS保护的Composer。 使用包信息加载composer存储库 警告：通过http访问packagist.org是一种不安全的协议。 更新依赖项（包括需要开发人员） 无法将您的需求解析为可安装的软件包集

Problem 1 - laravel/framework v5.4.9 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.8 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.7 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.6 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.5 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.4 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.3 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.28 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.27 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.26 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.25 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.24 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.23 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.22 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.21 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.20 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.2 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.19 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.18 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.17 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.16 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.15 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.14 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.13 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.12 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.11 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.10 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - Installation request for laravel/framework 5.4.* -> satisfiable by laravel/framework[v5.4.0, v5.4.1, v5.4.10, v5.4.11, v5.4.12, v5.4.13, v5.4.14, v5.4.15, v5.4.16, v5.4.17, v5.4.18, v5.4.19, v5.4.2, v5.4.20, v5.4.21, v5.4.22, v5.4.23, v5.4.24, v5.4.25, v5.4.26, v5.4.27, v5.4.28, v5.4.3, v5.4.4, v5.4.5, v5.4.6, v5.4.7, v5.4.8, v5.4.9]. 问题1 -laravel/framework v5.4.9需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.8需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.7需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.6需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.5需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.4需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.3需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.28需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.27需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.26需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.25需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.24需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.23需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.22需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.21需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.20需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.2需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.19需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.18需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.17需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.16需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.15需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.14需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.13需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.12需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.11需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.10需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.1需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -laravel/framework v5.4.0需要ext mbstring*->系统中缺少请求的PHP扩展mbstring。 -拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉拉8，v5.4.9]。 我从来没有遇到过在这里或谷歌找不到解决方案的情况。
谢谢 附言 我将php重新安装到C:/php 我将php.ini文件解压缩到C中：/ 我设置了环境变量 我还取消了扩展的注释

祝贺 最后我找到了解决办法。
我已经卸载了composer，我发现我的电脑中有2个php配置。 我已删除位于xampp文件夹外的配置。 我下载了一个新的PHP，并将其解压缩到xampp文件夹中 （您需要将php.ini-development文件更改为：php.ini） 然后您必须找到（ctrl+f）：extension_dir并将其修改为我的示例C:/xampp/php/ext中的路径 然后安装了composer，找到了php.exe，然后它说openssl有问题，所以我在php.ini文件中修改了相关的扩展名（只需删除；） 现在它工作得很好。

谢谢你的帮助

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您的安装似乎缺少

mbstring

扩展名。你需要安装/启用它。您能否运行

phpinfo（）

并查看它是否正在实际加载？这可能会给您一些帮助：它可能像启用它一样简单，或者您可能需要这样做 You are running Composer with SSL/TLS protection disabled. Loading composer repositories with package information composer install Problem 1 - laravel/framework v5.4.9 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.8 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.7 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.6 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.5 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.4 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.3 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.28 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.27 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.26 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.25 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.24 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.23 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.22 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.21 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.20 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.2 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.19 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.18 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.17 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.16 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.15 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.14 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.13 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.12 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.11 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.10 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - laravel/framework v5.4.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. - Installation request for laravel/framework 5.4.* -> satisfiable by laravel/framework[v5.4.0, v5.4.1, v5.4.10, v5.4.11, v5.4.12, v5.4.13, v5.4.14, v5.4.15, v5.4.16, v5.4.17, v5.4.18, v5.4.19, v5.4.2, v5.4.20, v5.4.21, v5.4.22, v5.4.23, v5.4.24, v5.4.25, v5.4.26, v5.4.27, v5.4.28, v5.4.3, v5.4.4, v5.4.5, v5.4.6, v5.4.7, v5.4.8, v5.4.9].