CodeIgniter composer.json安装第三类库操作

一、在站点根目录创建composer.json文件
{
"description": "The CodeIgniter framework",
"name": "codeigniter/framework",
"type": "project",
"homepage": "https://codeigniter.com",
"license": "MIT",
"support": {
"forum": "http://forum.codeigniter.com/",
"wiki": "https://github.com/bcit-ci/CodeIgniter/wiki",
"irc": "irc://irc.freenode.net/codeigniter",
"source": "https://github.com/bcit-ci/CodeIgniter"
},
"require": {
"php": ">=5.2.4",
"monolog/monolog": "~1.0",
"aws/aws-sdk-php": "*",
"phpoffice/phpexcel": "*",
"phpmailer/phpmailer": "*",
"mpdf/mpdf": "*"
},
"suggest": {
"paragonie/random_compat": "Provides better randomness in PHP 5.x"
},
"require-dev": {
"mikey179/vfsStream": "1.1.*"
}
}
二、操作composer.json，首先需要先安装composer的！
1、cmd-》站点目录-》composer install 第一次安装第三方类库
2、后期新增第三方类库，首先到https://packagist.org/packages/查看相应版本的类库，然后
     cmd-》站点目录-》composer require phpoffice/phpexcel * 回车就可以安装了
三、更新第三方类库
     cmd-》站点目录-》composer update


安装好类库后，就可以直接使用第三方类库里面的类了，有命名空间的，需要把类库中的命名空间加到文件的头部，然后直接实例化类库$objPHPExcel = new PHPExcel();