http://server/site02.

# Site 01
location / {
    root   /var/www/site01;
    index index.html index.php index.htm;

    try_files $uri $uri/ /index.php;

    location = /index.php {
        fastcgi_pass    127.0.0.1:9000;
        fastcgi_read_timeout 10000;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_buffer_size 16K;
        fastcgi_buffers 256 16k;
        include fastcgi_params;
    }
}

# Site 2
location /site02 {
    root /var/www/;
    index index.htm;

    try_files $uri $uri/ /index.php;

    location ~ ^/site02/index.php {
        try_files $uri =404;
        root /var/www/;
        fastcgi_pass    127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_read_timeout 10000;
        fastcgi_param SCRIPT_FILENAME   $document_root$fastcgi_script_name;
        fastcgi_buffer_size 16K;
        fastcgi_buffers 256 16k;
        include /etc/nginx/fastcgi_params;
    }
}

location /site02 {
    root /var/www/;
    index index.htm;

location /site02 {
    root /var/www/;
    index index.php index.htm;

location /site02 {
    root /var/www/;
    index index.php index.htm;

    try_files $uri $uri/ /site02/index.php;

    location ~ ^/site02/(.+.php)$ {
        root /var/www;
        try_files $uri $uri/ /site02/index.php;
        fastcgi_pass    127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_read_timeout 10000;
        fastcgi_param SCRIPT_FILENAME   $document_root$fastcgi_script_name;
        fastcgi_buffer_size 16K;
        fastcgi_buffers 256 16k;
        include fastcgi_params;
    }
}

server{

......
......
root   /var/www/;
index index.html index.php index.htm;

location / {
    try_files $uri $uri/ /index.php;

}
# Site 1
location /site01 {
    .....your parameters here...
}

# Site 2
location /site02 {
    .....your parameters here...
}

location ~ .php$ {
        try_files $uri =404;
        fastcgi_pass    127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_read_timeout 10000;
        fastcgi_param SCRIPT_FILENAME   $document_root$fastcgi_script_name;
        fastcgi_buffer_size 16K;
        fastcgi_buffers 256 16k;
        include fastcgi_params;
    }

}

root /var/www/html/;
server_name example.com;

# Site 01
location /site1 {
    alias /var/www/html/site1/;
    index index.htm index.php;
    try_files $uri $uri/ /site1/index.php;
}

# Site 2
location /site2 {
    alias /var/www/html/site2/;
    index index.htm index.php;
    try_files $uri $uri/ /site2/index.php;
}

error_page 404 /error/404.php;
fastcgi_intercept_errors on;

error_page 500 502 503 504 /50x.html;
location = /50x.html {
    root /usr/share/nginx/html;
}

location ~ .php$ {
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/run/php/php7.0-fpm.sock;
}