Manual:$wgValidationForAnons

Miscellaneous settings: $wgValidationForAnons
Whether to use article validation for anonymous users.
Introduced in version:1.5.0
Removed in version:1.6.0
Allowed values:(boolean)
Default value:true

Details

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If $wgUseValidation is true, then this settings specifies whether it should also be used for anonymous editors. If it is false then this setting is ignored.