Random Numbers or Password or Pin in MySQL

To obtain a random integer R in the range i <= R < j, use the expression FLOOR(i + RAND() * (j – i)). For example, to obtain a random integer in the range the range 7 <= R < 12, you could use the following statement:

SELECT FLOOR(7 + (RAND() * 5));

To generate between 1000 to 9999, i.e., 4 digits then you can do the following using update query
 

 UPDATE users SET password = FLOOR(1000 + RAND() * 8999);

Force HTTPS & WWW using htaccess

RewriteEngine on 

RewriteCond %{HTTPS} off

# First rewrite to HTTPS:
# Don't put www. here. If it is already there it will be included, if not
# the subsequent rule will catch it.

RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

# Now, rewrite any request to the wrong domain to use www.

RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]