用composer安裝php代碼（以安裝phpmailer為例）

1.安裝composer.exe軟件

2.下載composer.phar

3.創建composer.json文件

 

{
    "require": {
        "php": ">=5.5.9",
        "phpmailer/phpmailer": "~5.2"
    },
    "config": {
        "preferred-install": "dist"
    },
    "repositories": {
        "packagist": {
            "type": "composer",
            "url": "https://packagist.phpcomposer.com"
        }
    }
}

4.composer.phar和composer.json都放在項目根目錄下

5.安裝命令：php composer.char install