MediaWiki's UtfNormal library has been split into a separate wikimedia/utfnormal Composer package in MediaWiki version 1.25. However some extensions still use it:
vagrant/mediawiki/extensions$ ack UtfNormal:: --php
AbuseFilter/extensions/AntiSpoof/AntiSpoof_body.php
344: $testName = UtfNormal::toNFKD( $testName );
ActiveAbstract/AbstractFilter.php
113: return UtfNormal::cleanUp( $clipped );
217: $header = UtfNormal::cleanUp( $stripped );
AntiSpoof/AntiSpoof_body.php
354: $testName = UtfNormal::toNFKD( $testName );
Foxway/Foxway.body.php
50: return \UtfNormal::cleanUp($return);
85: return \UtfNormal::cleanUp($return);
LiquidThreads/classes/Hooks.php
229: $out .= UtfNormal::cleanUp( Xml::tags( 'DiscussionThreading', null, $threadInfo ) . "\n" );
PdfHandler/PdfHandler.image.php
141: $pages[$page] = UtfNormal::cleanUp( $pageText );
PhpTags/PhpTags.body.php
74: return \UtfNormal::cleanUp($return);
137: return \UtfNormal::cleanUp($return);
Scribunto/common/Hooks.php
136: return UtfNormal::cleanUp( strval( $result ) );
Scribunto/engines/LuaCommon/lualib/ustring/make-normalization-table.php
72:if ( !UtfNormal::$utfCheckNFC ||
73: !UtfNormal::$utfCombiningClass ||
74: !UtfNormal::$utfCanonicalDecomp ||
75: !UtfNormal::$utfCanonicalComp
79:if ( !UtfNormal::$utfCompatibilityDecomp ) {
98:foreach ( UtfNormal::$utfCheckNFC as $k => $v ) {
99: if ( isset( UtfNormal::$utfCombiningClass[$k] ) ) {
109:foreach ( UtfNormal::$utfCombiningClass as $k => $v ) {
118:foreach ( UtfNormal::$utfCanonicalDecomp as $k => $v ) {
130:foreach ( UtfNormal::$utfCompatibilityDecomp as $k => $v ) {
131: if ( isset( UtfNormal::$utfCanonicalDecomp[$k] ) && UtfNormal::$utfCanonicalDecomp[$k] === $v ) {
148:foreach ( UtfNormal::$utfCanonicalComp as $k => $v ) {
Scribunto/engines/LuaCommon/UstringLibrary.php
167: return array( UtfNormal::toNFC( $s ) );
175: return array( UtfNormal::toNFD( $s ) );
183: return array( UtfNormal::toNFKC( $s ) );
191: return array( UtfNormal::toNFKD( $s ) );
Translate/ffs/SimpleFFS.php
120: $input = UtfNormal::cleanUp( $input );
TranslationNotifications/extensions/Translate/ffs/SimpleFFS.php
120: $input = UtfNormal::cleanUp( $input );
Transliterator/Transliterator_body.php
219: $word = UtfNormal::toNFD( $word );
482: return UtfNormal::toNFC( $output );These extensions should all be fixed in order to clean the MediaWiki core code base of fallback code.
With exception of Scribunto/engines/LuaCommon/lualib/ustring/make-normalization-table.php which does some complex incantations with class aliasing, this task is very straightforward (see this example patch).