WordPress On Subdomain Blank - php

Question

I have a domain that works like a charm www.mydomain.com. Recently I wanted to add a subdomain like myotherweb.mydomain.com, so i add my subdomain from my cPanel and upload my Wordpress (works on XAMPP) to subdomain directory.
After that I try to open myotherweb.mydomain.com; the result is a blank page.
So I try to open myotherweb.mydomain.com/wp-admin and the Wordpress login page shows up, and I can log in to my wp-admin dashboard page. But when I try to edit a page, the edit page is blank.
What is happening in this case?

Answer 1

Probably this case happens if transfer of wordpress is not proper or .htaccess is not proper set.
.htaccess settings for subdomain
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ $1 [L]
RewriteRule . index.php [L]
For more reference you can check on Wordpres Codex htaccess
Transfer wordpress from one domain to another
This is most common problem happens to many when transfer from one domain to another.
Update Your wp-config.php File
define('WP_HOME','http://myotherweb.mydomain.com');
define('WP_SITEURL','http://myotherweb.mydomain.com');
Update urls in sql
For this open your exported database in text-editor like notepad+, sublime or netbeans, and do find and replace urls mydomain.com to myotherweb.mydomain.com and try import on live again,
or if you are not familiar with this or this is boring task for you then you don't need to panic, there is one plugin available to do this task for you very easily.
Install Wordpress duplicator plugin in your xampp and use as instruction given on plugin site or this reference site, after that upload new wordpress site generated by plugin on your subdomain.
Hope it will work for you.

Answer 2

I have solved this problem by install wordpress from my cPanel, and copy this setting from new Wordpress installation wp-config :
AUTH_KEY
SECURE_AUTH_KEY
LOGGED_IN_KEY
NONCE_KEY
AUTH_SALT
SECURE_AUTH_SALT
LOGGED_IN_SALT
NONCE_SALT
then replace my Wordpress project wp-config, and it's magic.
I don't know why it's necessary.