nginx配置单域名访问多个项目

网上那些配置什么alias,location，rewrite什么的都麻烦而且不好使，我就想着直接替换root 根目录配置它不香么。果然试了试就成功了，原来这么简单，我还搞了老半天。配置如下：

server{
	listen 80;
	server_name my.com;

    if ($request_uri ~* ^/project1/?.*) {
        set $r "/var/www/project1/src/public";
    }

    if ($request_uri ~* ^/project2/?.*) {
        set $r "/var/www/project2/src/public";
    }

    root $r;

	index index.php index.html index.htm;
	access_log /var/log/nginx/your_server.access.log;
	error_log /var/log/nginx/your_server.error.log error;

	location / {     
		try_files $uri $uri/ /index.php?$query_string;
	}                                                                                                  
    location ~ index.php {
        fastcgi_pass   php:9000;
        fastcgi_index  index.php;
        fastcgi_param  script_FILENAME  $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }