Manual:$wgFixArabicUnicode

Language, regional and character encoding settings: $wgFixArabicUnicode
Set this to true to clean up archaic Unicode sequences in Arabic text.
Introduced in version:1.16.0 (r61282)
Deprecated in version:1.33.0 (Gerrit change 468598; git #103a4f76)
Removed in version:1.35.0 (Gerrit change 573848; git #Idefd562)
Allowed values:(boolean)
Default value:true

Details

Set this to true to replace Arabic presentation forms with their standard forms in the U+0600-U+06FF block. This only works if $wgLanguageCode is set to "ar".

Pages with titles containing presentation forms will become inaccessible, run maintenance /cleanupTitles.php to fix this.