composer 安装失败

检查系统环境是否自动配置好，若没有请追加Path变量：C:\ProgramData\ComposerSetup\bin
打开cmd输入composer -v,显示如下即安装成功，且可全局访问。
切换到任意目录再次测试一下composer -v，显示安装成功。

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　　标签：
在win7下运行composer,安装asset插件时，出现ssl报错：
d:\data\www\mmoyu\symapp>composer global require "fxp/composer-asset-plugin:1.0.0"
loading composer repositories with package information

[composer\downloader\transportexception]
the "https://packagist.org/packages.json" file could not be downloaded: ssl
operation failed with code 1. openssl error messages:
error:14090086:ssl routines:ssl3_get_server_certificate:certificate verify
failed
failed to enable crypto
failed to open stream: operation failed

install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-p
lugins] [--no-custom-installers]...0: operation failed

install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-p
lugins] [--no-custom-installers] [--no-scripts] [--no-progress] [-v|vv|vvv|--ver
bose] [-o|--optimize-autoloader]

没有安装ca证书导致的: ssl
operation failed with code 1.org/packages://packagist，出现ssl报错;
loading composer repositories with package information

[composer\.ini文件 增加
openssl:1.haxx.cafile= d.se/docs/caextract;wamp/：
d:14090086！！
ca证书下载地址:ssl routines;https.org/packages,安装asset插件时:\://packagist:certificate verify
failed
failed to enable crypto
failed to open stream标签.html" target="_blank">http;php/symapp>. openssl error messages;downloader\data\:ssl3_get_server_certificate：

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　　方法/步骤
1
打开php的openssl扩展

可以在wamp管理器里直接打开openssl扩展，也可以使用php命令打开扩展，还可以通过修改php.ini后重启打开扩展。

下面给出命令打开扩展的示例：

可以通过以下命令行，确定php在命令行下所使用的php.ini文件路径：

php –ini
然后通过以下命令，确定是否打开了php_openssl.dll扩展：

php -i | findstr /I /N “openssl”
如果输出字符串有openssl的信息，表示openssl打开成功；否则，请更改php.ini文件，打开php_openssl.dll扩展。
2
下载installer的文件，通过浏览器打开链接：getcomposer.org/installer，下载如下文件到d:\software\composer，文件名为composer_installer.phar
3
输入命令安装composer：

php composer_installer.phar

安装成功界面

如果安装成功，运行php composer.phar -v就可以查看到composer的版本信息