linux 安装composer

linux 安装composer 

1.php -r "copy('http://getcomposer.org/installer','composer-setup.php');"  //下载

1.2. php -r "if (hash_file('SHA384', 'composer-setup.php') === 'e115a8dc7871f15d853148a7fbac7da27d6c0030b848d9b3dc09e2a0388afed865e6a3d6b3c0fad45c48e2b5fc1196ae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"  //验证安装文件的完整性 我安装时没有执行这一步

2.php composer-setup.php –install-dir = /usr/local / bin –filename = composer  // 安装

3.php -r "unlink('composer-setup.php');"  //删除安装文件

4.cp composer.phar /usr/local/bin/composer //全局安装

5.composer -V  //查看成功