Laravel and WordPress integration routing using nginx

Solution:

The configuration would be simpler if the base URI for each of the applications did not overlap. But given the constraints of your question, you must use two distinct document roots for the PHP section of each of the applications in your configuration.

As you have placed one of your applications in /, the other application is kept separate by the use of nested location blocks. Notice the use of the ^~ modifier to prevent the first PHP block from processing Laravel requests.

index index.php index.html index.htm;

root /var/www/root/wpApp;

location / {
    try_files $uri $uri/ /index.php?$query_string;
}

location ~ \.php$ {
    try_files $uri /index.php;
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_pass unix:/run/php/php7.0-fpm.sock;
}

location ^~ /laraApp {
    rewrite ^/laraApp(.*)$ /laraApp/public$1 last;
}

location ^~ /laraApp/public {
    root /var/www/root;

    try_files $uri $uri/ /laraApp/public/index.php?$query_string;

    location ~ \.php$ {
        try_files $uri /laraApp/public/index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }
}

I am away from my test system at the moment so the above has not been syntax checked or tested.