方法一:
下载Composer-Setup.exe后安装,它会自动搜索 php.exe 路径, 如果找不到,则手动添加路径。
![](http://upload-images.jianshu.io/upload_images/2484152-7c8f53437b889b8d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/503/format/webp)
Windows安装Composer
方法二:
如果出现如下错误,说明伟大的防火墙阻止了你获取存在国外服务器的文件,需要手动下载一下
![](http://upload-images.jianshu.io/upload_images/2484152-cce37e4f7d972af4.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/503/format/webp)
Windows安装Composer
第一步:添加php.exe到环境变量
方法:计算机-->右键-->属性-->高级系统设置-->环境变量(这一步相信大家都是妥妥的)
![](http://upload-images.jianshu.io/upload_images/2484152-45b885c50a57f765.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/420/format/webp)
Windows安装Composer
复制php.exe的路径,粘贴到path环境变量中(注意前面有一个分号;),图片如下:
![](http://upload-images.jianshu.io/upload_images/2484152-7e392eead8300237.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/394/format/webp)
Windows安装Composer
php -v 执行成功会返回版本信息,这里是PHP 7.0.12
![](http://upload-images.jianshu.io/upload_images/2484152-0f181bcd2d46956a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/519/format/webp)
Windows安装Composer
第二步:开启openssl扩展
方法:在PHP目录下,打开php.ini文件,去掉extension=php_openssl.dll前面的分号(;)
![](http://upload-images.jianshu.io/upload_images/2484152-bc823d2cdc1d7a67.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/592/format/webp)
Windows安装Composer
第三:下载composer.phar并放到PHP目录下,在PHP目录下新建composer.cmd, 内容为:
@php "%~dp0composer.phar" %*
![](http://upload-images.jianshu.io/upload_images/2484152-626e397ccb151b87.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/565/format/webp)
Windows安装Composer
保存后,运行这个文件,打开cmd,输入 composer -V 查看是否成功
![](http://upload-images.jianshu.io/upload_images/2484152-144ed29c082eb59c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/461/format/webp)
Windows安装Composer
第四:更改 Packagist 为国内镜像
composer config -g repo.packagist composer https://packagist.phpcomposer.com
![](http://upload-images.jianshu.io/upload_images/2484152-572d718ae9edf85f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/648/format/webp)
Windows安装Composer