Manual:$wgInvalidPasswordReset

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Authentication: $wgInvalidPasswordReset
Specifies if users should be sent to a password-reset form on login in case of an inadequate password.
Introduced in version:1.23.0 (Gerrit change 117635; git #9d7af803)
Removed in version:still in use
Allowed values:(boolean)
Default value:true

Details[edit]

Specifies if users should be sent to a password-reset form on login, if their password doesn't meet the requirements of User::isValidPassword().