composer安装SSL证书异常处理，报错信息：error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed

最近发现composer的传统安装方式不行了

传统方式

curl --insecure -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

主要是，执行

curl --insecure -sS https://getcomposer.org/installer | php

报错。

有的时候报错

All settings correct for using Composer
Downloading...
Failed to decode zlib stream

有的时候报错

All settings correct for using Composer
Downloading...
The "https://getcomposer.org/versions" file could not be downloaded: SSL operation failed with code 1. Open
SSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
Retrying...
The "https://getcomposer.org/versions" file could not be downloaded: SSL operation failed with code 1. Open
SSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
Retrying...
The "https://getcomposer.org/versions" file could not be downloaded: SSL operation failed with code 1. Open
SSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
The download failed repeatedly, aborting.

使用

curl --insecure -ksS https://getcomposer.org/installer | php

也不行，依然报错

All settings correct for using Composer
Downloading...
The "https://getcomposer.org/versions" file could not be downloaded: SSL operation failed with code 1. Open
SSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
Retrying...
The "https://getcomposer.org/versions" file could not be downloaded: SSL operation failed with code 1. Open
SSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
Retrying...
The "https://getcomposer.org/versions" 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
The download failed repeatedly, aborting.

执行

php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');"

也不行。

可能是我服务器的证书问题，具体原因不详，具体解决方案如下

wget --no-check-certificate https://install.phpcomposer.com/installer -O ./composer-setup.php

下载安装文件，再下载证书文件

wget https://curl.haxx.se/ca/cacert.pem --no-check-certificate -O ./cacert.pem

修改php.ini中的openssl.cafile配置

vi /usr/local/lib/php.ini

修改为

openssl.cafile=/root/cacert.pem

退出修改在执行

php composer-setup.php

就可以安装成功了