Slim 3.0无法使用php-fpm 7和nginx。返回404

Question

我在Centos 7上使用php-fpm 7和SlimFramework 3.0，nginx设置了一个Slim应用程序。这是我的配置：

    location /projects/ {
        root /var/www/html;
        rewrite index.php/(.*)$ index.php?url=$1 last;
        index  index.html $yii_bootstrap;
        try_files $uri $uri/ /$yii_bootstrap?$args /index.php$is_args$args;
    }
    location ~ \.php{
      fastcgi_split_path_info ^(.+\.php)(/.+)$;
      fastcgi_pass php-fpm;
      fastcgi_index index.php;
      fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
      fastcgi_param SCRIPT_NAME $fastcgi_script_name;
      include fastcgi_params;
  }

和

upstream php-fpm {
        #server 127.0.0.1:9000;
        server unix:/run/php-fpm/www.sock;
}

然而，它无法正常工作，并为任何路线返回404。我的测试路线是：

$app = new \Slim\App();
$app->get('/cc', function ($request, $response, $args) {
    $response->write("dcmmm");
    return $response;
});