automatic login to wordpress dashboard from another site

I want to log in automatically to WP admin/dashboard from another site without going thru the login process.. I’ve tried the following but with no luck:

php redirect when wrong password

is this right the code will redirect a person to the login page when they try to access it using without going into the login page <…

PHP $_SESSION for multiple users at once

I’m wondering about how the $_SESSION array works. If I have a lot of users using my site do I need to set a subarray for each user? For instance right now I have $_SESSION[‘userid’] = $userid; $…

SHA1 vs md5 vs SHA256: which to use for a PHP login?

I’m making a php login, and I’m trying to decide whether to use SHA1 or Md5, or SHA256 which I read about in another stackoverflow article. Are any of them more secure than others? For SHA1/256, do I …