wikimedia / mediawiki

		// Optional notice for the entire namespace

		$editnotice_ns = 'editnotice-' . $this->getNamespace();

		$msg = wfMessage( $editnotice_ns );

		if ( $msg->exists() ) {

			$html = $msg->parseAsBlock();

			// Edit notices may have complex logic, but output nothing (T91715)

			if ( trim( $html ) !== '' ) {

				$notices[$editnotice_ns] = Html::rawElement(

					'div',

					[ 'class' => [

						'mw-editnotice',

						'mw-editnotice-namespace',

						Sanitizer::escapeClass( "mw-$editnotice_ns" )

					] ],

					$html

				);

			}

		}

		if ( MWNamespace::hasSubpages( $this->getNamespace() ) ) {

			// Optional notice for page itself and any parent page

			while ( count( $parts ) > 0 ) {

				$editnotice_base .= '-' . array_shift( $parts );

				$msg = wfMessage( $editnotice_base );

				if ( $msg->exists() ) {

					$html = $msg->parseAsBlock();

					if ( trim( $html ) !== '' ) {

						$notices[$editnotice_base] = Html::rawElement(

							'div',

							[ 'class' => [

								'mw-editnotice',

								'mw-editnotice-base',

								Sanitizer::escapeClass( "mw-$editnotice_base" )

							] ],

							$html

						);

					}

				}

			}

		} else {

			// Even if there are no subpages in namespace, we still don't want "/" in MediaWiki message keys

			// Even if there are no subpages in namespace, we still don't want "/" in MediaWiki message keys

			$editnoticeText = $editnotice_ns . '-' . strtr( $this->getDBkey(), '/', '-' );

			$msg = wfMessage( $editnoticeText );

			if ( $msg->exists() ) {

				$html = $msg->parseAsBlock();

				if ( trim( $html ) !== '' ) {

					$notices[$editnoticeText] = Html::rawElement(

						'div',

						[ 'class' => [

							'mw-editnotice',

							'mw-editnotice-page',

							Sanitizer::escapeClass( "mw-$editnoticeText" )

						] ],

						$html

					);

				}

			}

		}

		Hooks::run( 'TitleGetEditNotices', [ $this, $oldid, &$notices ] );