Retrieve the current user object.
wp_set_current_user
Changes the current user by ID or name.
wp_login
Checks a users login information and logs them in if it checks out. This function is deprecated.
wp_get_cookie_login
Gets the user cookie login. This function is deprecated.
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wp_clearcookie
Clears the authentication cookie, logging the user out. This function is deprecated.
wp_setcookie
Sets a cookie for a user who just logged in. This function is deprecated.
get_user_by_email
Retrieve user info by email.
get_userdatabylogin
Retrieve user info by login name.
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get_currentuserinfo
Populate global variables with information about the currently logged in user.
set_current_user
Changes the current user by ID or name.
filter_default_option
Filters the default value for the option.
get_registered_settings
Retrieves an array of registered settings.
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unregister_setting
Unregisters a setting.
register_setting
Registers a setting and its data.
register_initial_settings
Registers default settings available in WordPress.