$user: User (object) that will clear the message
$oldid: ID of the talk page revision being viewed (0 means the most recent one)
-'UserComparePasswords': Called when checking passwords, return false to
-override the default password checks. REMOVED since 1.23, use Password class instead.
-&$hash: String of the password hash (from the database)
-&$password: String of the plaintext password the user entered
-&$userId: Integer of the user's ID or Boolean false if the user ID was not
- supplied
-&$result: If the hook returns false, this Boolean value will be checked to
- determine if the password was valid
-
'UserCreateForm': change to manipulate the login form
$template: SimpleTemplate instance for the form
-'UserCryptPassword': Called when hashing a password, return false to implement
-your own hashing method. REMOVED since 1.23, use Password class instead.
-&$password: String of the plaintext password to encrypt
-&$salt: String of the password salt or Boolean false if no salt is provided
-&$wgPasswordSalt: Boolean of whether the salt is used in the default hashing
- method
-&$hash: If the hook returns false, this String will be used as the hash
-
'UserEffectiveGroups': Called in User::getEffectiveGroups().
$user: User to get groups for
&$groups: Current effective groups