I can see two cookies: auth and login cookies in wordpress. Why do we need two? I think one is enough.
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2 Answers
"On login, wordpress uses the wordpress_[hash] cookie to store your authentication details. It's use is limited to the admin console area, /wp-admin/
After login, wordpress sets the wordpress_logged_in_[hash] cookie, which indicates when you're logged in, and who you are, for most interface use.
Wordpress also sets a few wp-settings-{time}-[UID] cookies. The number on the end is your individual user ID from the users database table. This is used to customize your view of admin interface, and possibly also the main site interface."
answered Jun 7, 2012 at 22:33
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when I ask this question, there isn't a doc like now in wordpress codex :( Jun 8, 2012 at 17:04
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That page has been there since 6/21/05 - codex.wordpress.org/… (login to wordpress.org needed) and hasn't been altered for nearly 3 months. Jun 11, 2012 at 20:55
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7This still doesn't answer why Wordpress needs two cookies. Both cookies authenticate you, why have one cookie for
wp-adminand one cookie for other areas of the website?– FlimmJul 6, 2017 at 9:10
I believe the two cookies are to do with SSL. When using the admin area you want it secure and so you cannot have the authentication cookie details always presented to everyone on your site (such as non-SSL connections). However there are times you want to be known as logged in but not using the secure connection. So by separating them you can edit your site with the auth cookie details and remain logged in across the entire site with the logged in cookie.