wget https://getcomposer.org/installer  //下載一個指令碼檔案

php installer  //php執行下這個php指令碼

mv composer.phar /usr/bin/composer   //下載的檔案轉移到執行目錄

composer config -g repo.packagist composer https://packagist.laravel-china.org //解決下載慢，不要用https://packagist.phpcomposer.com

composer require overtrue/wechat:~4.0 -vvv   //例子

<?php
require_once(dirname(__FILE__)."/vendor/autoload.php");
use EasyWeChat\Factory;

$options = [ 
    'app_id'    => 'wx3cf0f39249eb0exxx',
    'secret'    => 'f1c242f4f28f735d4687abb469072xxx',
    'token'     => 'easywechat',
    'log' => [
        'level' => 'debug',
        'file'  => '/tmp/easywechat.log',
    ]
 
,  
    // ...
];

$app = Factory::officialAccount($options);

$server = $app->server;
$user = $app->user;

$server->push(function($message) use ($user) {
    $fromUser = $user->get($message['FromUserName']);

    return "{$fromUser->nickname} 您好！歡迎關注 overtrue!";
});

$server->serve()->send();