62 if ( isset( $p[
'dbFilePath'] ) ) {
63 parent::__construct( $p );
68 $lockDomain = md5( $p[
'dbFilePath'] );
69 } elseif ( !isset( $p[
'dbDirectory'] ) ) {
70 throw new InvalidArgumentException(
"Need 'dbDirectory' or 'dbFilePath' parameter." );
72 $this->dbDir = $p[
'dbDirectory'];
73 $this->mDBname = $p[
'dbname'];
76 parent::__construct( $p );
78 if ( $p[
'dbname'] && !$this->
isOpen() ) {
79 if ( $this->
open( $p[
'host'], $p[
'user'], $p[
'password'], $p[
'dbname'] ) ) {
81 foreach ( $this->tableAliases
as $params ) {
82 if ( isset( $done[
$params[
'dbname']] ) ) {
92 $this->trxMode = isset( $p[
'trxMode'] ) ? strtoupper( $p[
'trxMode'] ) :
null;
93 if ( $this->trxMode &&
94 !in_array( $this->trxMode, [
'DEFERRED',
'IMMEDIATE',
'EXCLUSIVE' ] )
96 $this->trxMode =
null;
97 $this->queryLogger->warning(
"Invalid SQLite transaction mode provided." );
101 'domain' => $lockDomain,
102 'lockDirectory' =>
"{$this->dbDir}/locks"
116 $p[
'dbFilePath'] = $filename;
117 $p[
'schema'] =
false;
118 $p[
'tablePrefix'] =
'';
150 function open( $server, $user, $pass, $dbName ) {
153 if ( !is_readable( $fileName ) ) {
154 $this->mConn =
false;
172 $this->dbPath = $fileName;
174 if ( $this->mFlags & self::DBO_PERSISTENT ) {
175 $this->mConn =
new PDO(
"sqlite:$fileName",
'',
'',
176 [ PDO::ATTR_PERSISTENT =>
true ] );
178 $this->mConn =
new PDO(
"sqlite:$fileName",
'',
'' );
180 }
catch ( PDOException
$e ) {
181 $err =
$e->getMessage();
184 if ( !$this->mConn ) {
185 $this->queryLogger->debug(
"DB connection error: $err\n" );
190 if ( $this->mOpened ) {
191 # Set error codes only, don't raise exceptions
192 $this->mConn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT );
193 # Enforce LIKE to be case sensitive, just like MySQL
194 $this->
query(
'PRAGMA case_sensitive_like = 1' );
227 return "$dir/$dbName.sqlite";
235 if ( self::$fulltextEnabled ===
null ) {
236 self::$fulltextEnabled =
false;
237 $table = $this->
tableName(
'searchindex' );
238 $res = $this->
query(
"SELECT sql FROM sqlite_master WHERE tbl_name = '$table'", __METHOD__ );
240 $row =
$res->fetchRow();
241 self::$fulltextEnabled = stristr( $row[
'sql'],
'fts' ) !==
false;
253 static $cachedResult =
null;
254 if ( $cachedResult !==
null ) {
255 return $cachedResult;
257 $cachedResult =
false;
258 $table =
'dummy_search_test';
261 if ( $db->query(
"CREATE VIRTUAL TABLE $table USING FTS3(dummy_field)", __METHOD__,
true ) ) {
262 $cachedResult =
'FTS3';
266 return $cachedResult;
286 return $this->
query(
"ATTACH DATABASE $file AS $name",
$fname );
290 return parent::isWriteQuery( $sql ) && !preg_match(
'/^(ATTACH|PRAGMA)\b/i', $sql );
300 $res = $this->mConn->query( $sql );
301 if (
$res ===
false ) {
306 $this->mAffectedRows = $r->rowCount();
334 $cur = current( $r );
335 if ( is_array( $cur ) ) {
338 foreach ( $cur
as $k => $v ) {
339 if ( !is_numeric( $k ) ) {
360 $cur = current( $r );
361 if ( is_array( $cur ) ) {
388 if ( is_array( $r ) && count( $r ) > 0 ) {
390 return count( $r[0] ) / 2;
404 if ( is_array( $r ) ) {
405 $keys = array_keys( $r[0] );
422 if ( strpos(
$name,
'sqlite_' ) === 0 ) {
426 return str_replace(
'"',
'', parent::tableName(
$name, $format ) );
446 return intval( $this->mConn->lastInsertId() );
461 for ( $i = 0; $i < $row; $i++ ) {
471 if ( !is_object( $this->mConn ) ) {
472 return "Cannot return last error, no db connection";
474 $e = $this->mConn->errorInfo();
476 return isset(
$e[2] ) ?
$e[2] :
'';
483 if ( !is_object( $this->mConn ) ) {
484 return "Cannot return last error, no db connection";
486 $info = $this->mConn->errorInfo();
515 if (
$res->numRows() == 0 ) {
519 foreach (
$res as $row ) {
520 $info[] = $row->name;
533 $row = $this->
selectRow(
'sqlite_master',
'*',
538 if ( !$row || !isset( $row->sql ) ) {
543 $indexPos = strpos( $row->sql,
'INDEX' );
544 if ( $indexPos ===
false ) {
547 $firstPart = substr( $row->sql, 0, $indexPos );
548 $options = explode(
' ', $firstPart );
550 return in_array(
'UNIQUE',
$options );
561 if ( is_numeric( $k ) && ( $v ==
'FOR UPDATE' || $v ==
'LOCK IN SHARE MODE' ) ) {
566 return parent::makeSelectOptions(
$options );
585 # SQLite uses OR IGNORE not just IGNORE
587 if ( $v ==
'IGNORE' ) {
602 return parent::makeInsertOptions(
$options );
614 if ( !count( $a ) ) {
618 # SQLite can't handle multi-row inserts, so divide up into multiple single-row inserts
619 if ( isset( $a[0] ) && is_array( $a[0] ) ) {
621 foreach ( $a
as $v ) {
622 if ( !parent::insert( $table, $v,
"$fname/multi-row",
$options ) ) {
627 $ret = parent::insert( $table, $a,
"$fname/single-row",
$options );
641 if ( !count( $rows ) ) {
645 # SQLite can't handle multi-row replaces, so divide up into multiple single-row queries
646 if ( isset( $rows[0] ) && is_array( $rows[0] ) ) {
648 foreach ( $rows
as $v ) {
649 if ( !$this->
nativeReplace( $table, $v,
"$fname/multi-row" ) ) {
685 $glue = $all ?
' UNION ALL ' :
' UNION ';
687 return implode( $glue, $sqls );
715 return "[{{int:version-db-sqlite-url}} SQLite]";
722 $ver = $this->mConn->getAttribute( PDO::ATTR_SERVER_VERSION );
737 $sql =
'PRAGMA table_info(' . $this->
addQuotes( $tableName ) .
')';
739 foreach (
$res as $row ) {
740 if ( $row->name == $field ) {
749 if ( $this->trxMode ) {
754 $this->mTrxLevel = 1;
770 return new Blob( $b );
778 if ( $b instanceof
Blob ) {
790 if (
$s instanceof
Blob ) {
791 return "x'" . bin2hex(
$s->fetch() ) .
"'";
792 } elseif ( is_bool(
$s ) ) {
794 } elseif ( strpos(
$s,
"\0" ) !==
false ) {
804 $this->queryLogger->debug(
806 ': Quoting value containing null byte. ' .
807 'For consistency all binary data should have been ' .
808 'first processed with self::encodeBlob()'
810 return "x'" . bin2hex(
$s ) .
"'";
812 return $this->mConn->quote(
$s );
825 return parent::buildLike(
$params ) .
"ESCAPE '\' ";
834 return 'CAST ( ' . $field .
' AS TEXT )';
843 $args = func_get_args();
844 $function = array_shift(
$args );
846 return call_user_func_array( $function,
$args );
854 $s = parent::replaceVars(
$s );
855 if ( preg_match(
'/^\s*(CREATE|ALTER) TABLE/i',
$s ) ) {
859 $s = preg_replace(
'/\b(var)?binary(\(\d+\))/i',
'BLOB',
$s );
861 $s = preg_replace(
'/\b(un)?signed\b/i',
'',
$s );
863 $s = preg_replace(
'/\b(tiny|small|medium|big|)int(\s*\(\s*\d+\s*\)|\b)/i',
'INTEGER',
$s );
866 '/\b(float|double(\s+precision)?)(\s*\(\s*\d+\s*(,\s*\d+\s*)?\)|\b)/i',
871 $s = preg_replace(
'/\b(var)?char\s*\(.*?\)/i',
'TEXT',
$s );
873 $s = preg_replace(
'/\b(tiny|medium|long)text\b/i',
'TEXT',
$s );
875 $s = preg_replace(
'/\b(tiny|small|medium|long|)blob\b/i',
'BLOB',
$s );
877 $s = preg_replace(
'/\bbool(ean)?\b/i',
'INTEGER',
$s );
879 $s = preg_replace(
'/\b(datetime|timestamp)\b/i',
'TEXT',
$s );
881 $s = preg_replace(
'/\benum\s*\([^)]*\)/i',
'TEXT',
$s );
883 $s = preg_replace(
'/\bbinary\b/i',
'',
$s );
885 $s = preg_replace(
'/\bauto_increment\b/i',
'AUTOINCREMENT',
$s );
887 $s = preg_replace(
'/\)[^);]*(;?)\s*$/',
')\1',
$s );
889 $s = preg_replace(
'/primary key (.*?) autoincrement/i',
'PRIMARY KEY AUTOINCREMENT $1',
$s );
890 } elseif ( preg_match(
'/^\s*CREATE (\s*(?:UNIQUE|FULLTEXT)\s+)?INDEX/i',
$s ) ) {
892 $s = preg_replace(
'/\(\d+\)/',
'',
$s );
894 $s = preg_replace(
'/\bfulltext\b/i',
'',
$s );
895 } elseif ( preg_match(
'/^\s*DROP INDEX/i',
$s ) ) {
897 $s = preg_replace(
'/\sON\s+[^\s]*/i',
'',
$s );
898 } elseif ( preg_match(
'/^\s*INSERT IGNORE\b/i',
$s ) ) {
900 $s = preg_replace(
'/^\s*INSERT IGNORE\b/i',
'INSERT OR IGNORE',
$s );
906 public function lock( $lockName, $method, $timeout = 5 ) {
907 if ( !is_dir(
"{$this->dbDir}/locks" ) ) {
908 if ( !is_writable( $this->dbDir ) || !mkdir(
"{$this->dbDir}/locks" ) ) {
909 throw new DBError( $this,
"Cannot create directory \"{$this->dbDir}/locks\"." );
916 public function unlock( $lockName, $method ) {
927 return '(' . implode(
') || (', $stringList ) .
')';
931 $delim, $table, $field, $conds =
'', $join_conds = []
933 $fld =
"group_concat($field," . $this->
addQuotes( $delim ) .
')';
935 return '(' . $this->
selectSQLText( $table, $fld, $conds,
null, [], $join_conds ) .
')';
947 $res = $this->
query(
"SELECT sql FROM sqlite_master WHERE tbl_name=" .
951 throw new RuntimeException(
"Couldn't retrieve structure for table $oldName" );
955 '/(?<=\W)"?' . preg_quote( trim( $this->
addIdentifierQuotes( $oldName ),
'"' ) ) .
'"?(?=\W)/',
961 if ( preg_match(
'/^\\s*CREATE\\s+VIRTUAL\\s+TABLE\b/i', $sql ) ) {
962 $this->queryLogger->debug(
963 "Table $oldName is virtual, can't create a temporary duplicate.\n" );
965 $sql = str_replace(
'CREATE TABLE',
'CREATE TEMPORARY TABLE', $sql );
972 $indexList = $this->
query(
'PRAGMA INDEX_LIST(' . $this->
addQuotes( $oldName ) .
')' );
973 foreach ( $indexList
as $index ) {
974 if ( strpos( $index->name,
'sqlite_autoindex' ) === 0 ) {
978 if ( $index->unique ) {
979 $sql =
'CREATE UNIQUE INDEX';
981 $sql =
'CREATE INDEX';
984 $indexName = $newName .
'_' . $index->name;
985 $sql .=
' ' . $indexName .
' ON ' . $newName;
987 $indexInfo = $this->
query(
'PRAGMA INDEX_INFO(' . $this->
addQuotes( $index->name ) .
')' );
989 foreach ( $indexInfo
as $indexInfoRow ) {
990 $fields[$indexInfoRow->seqno] = $indexInfoRow->name;
993 $sql .=
'(' . implode(
',', $fields ) .
')';
995 $this->
query( $sql );
1019 $vars = get_object_vars( $table );
1020 $table = array_pop(
$vars );
1022 if ( !$prefix || strpos( $table, $prefix ) === 0 ) {
1023 if ( strpos( $table,
'sqlite_' ) !== 0 ) {
1024 $endArray[] = $table;
1040 public function dropTable( $tableName, $fName = __METHOD__ ) {
1041 if ( !$this->
tableExists( $tableName, $fName ) ) {
1044 $sql =
"DROP TABLE " . $this->
tableName( $tableName );
1046 return $this->
query( $sql, $fName );
1057 return 'SQLite ' . (
string)$this->mConn->getAttribute( PDO::ATTR_SERVER_VERSION );
if(!defined( 'MEDIAWIKI')) $fname
This file is not a valid entry point, perform no further processing unless MEDIAWIKI is defined.
Database error base class.
indexInfo( $table, $index, $fname=__METHOD__)
Returns information about an index Returns false if the index does not exist.
isWriteQuery( $sql)
Determine whether a query writes to the DB.
openFile( $fileName)
Opens a database file.
attachDatabase( $name, $file=false, $fname=__METHOD__)
Attaches external database to our connection, see http://sqlite.org/lang_attach.html for details.
int $mAffectedRows
The number of rows affected as an integer.
indexUnique( $table, $index, $fname=__METHOD__)
doQuery( $sql)
SQLite doesn't allow buffered results or data seeking etc, so we'll use fetchAll as the result.
deadlockLoop()
No-op version of deadlockLoop.
numRows( $res)
The PDO::Statement class implements the array interface so count() will work.
makeUpdateOptionsArray( $options)
static bool $fulltextEnabled
Whether full text is enabled.
textFieldSize( $table, $field)
Returns the size of a text field, or -1 for "unlimited" In SQLite this is SQLITE_MAX_LENGTH,...
doBegin( $fname='')
Issues the BEGIN command to the database server.
tableName( $name, $format='quoted')
Use MySQL's naming (accounts for prefix etc) but remove surrounding backticks.
fieldInfo( $table, $field)
Get information about a given field Returns false if the field does not exist.
dropTable( $tableName, $fName=__METHOD__)
Override due to no CASCADE support.
static getFulltextSearchModule()
Returns version of currently supported SQLite fulltext search module or false if none present.
checkForEnabledSearch()
Check if the searchindext table is FTS enabled.
unionQueries( $sqls, $all)
buildGroupConcatField( $delim, $table, $field, $conds='', $join_conds=[])
Build a GROUP_CONCAT or equivalent statement for a query.
listTables( $prefix=null, $fname=__METHOD__)
List all tables on the database.
string $trxMode
Transaction mode.
makeSelectOptions( $options)
Filter the options used in SELECT statements.
FSLockManager $lockMgr
(hopefully on the same server as the DB)
static newStandaloneInstance( $filename, array $p=[])
static generateFileName( $dir, $dbName)
Generates a database file name.
closeConnection()
Does not actually close the connection, just destroys the reference for GC to do its work.
unlock( $lockName, $method)
Release a lock.
string $dbPath
File name for SQLite database file.
insertId()
This must be called after nextSequenceVal.
lock( $lockName, $method, $timeout=5)
Acquire a named lock.
duplicateTableStructure( $oldName, $newName, $temporary=false, $fname=__METHOD__)
__construct(array $p)
Additional params include:
unionSupportsOrderAndLimit()
insert( $table, $a, $fname=__METHOD__, $options=[])
Based on generic method (parent) with some prior SQLite-sepcific adjustments.
buildConcat( $stringList)
Build a concatenation list to feed into a SQL query.
open( $server, $user, $pass, $dbName)
Open an SQLite database and return a resource handle to it NOTE: only $dbName is used,...
static fixIgnore( $options)
indexName( $index)
Index names have DB scope.
replace( $table, $uniqueIndexes, $rows, $fname=__METHOD__)
makeInsertOptions( $options)
Relational database abstraction object.
close()
Closes a database connection.
selectSQLText( $table, $vars, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])
The equivalent of IDatabase::select() except that the constructed SQL is returned,...
addIdentifierQuotes( $s)
Quotes an identifier using backticks or "double quotes" depending on the database type.
static factory( $dbType, $p=[])
Construct a Database subclass instance given a database type and parameters.
tableExists( $table, $fname=__METHOD__)
Query whether a given table exists.
nativeReplace( $table, $rows, $fname)
REPLACE query wrapper for MySQL and SQLite, which have a native REPLACE statement.
isOpen()
Is a connection to the database open?
query( $sql, $fname=__METHOD__, $tempIgnore=false)
Run an SQL query and return the result.
selectRow( $table, $vars, $conds, $fname=__METHOD__, $options=[], $join_conds=[])
Single row SELECT wrapper.
Simple version of LockManager based on using FS lock files.
Result wrapper for grabbing data queried from an IDatabase object.
We use the convention $dbr for read and $dbw for write to help you keep track of whether the database object is a the world will explode Or to be a subsequent write query which succeeded on the master may fail when replicated to the slave due to a unique key collision Replication on the slave will stop and it may take hours to repair the database and get it back online Setting read_only in my cnf on the slave will avoid this but given the dire we prefer to have as many checks as possible We provide a but the wrapper functions like select() and insert() are usually more convenient. They take care of things like table prefixes and escaping for you. If you really need to make your own SQL
We use the convention $dbr for read and $dbw for write to help you keep track of whether the database object is a the world will explode Or to be a subsequent write query which succeeded on the master may fail when replicated to the slave due to a unique key collision Replication on the slave will stop and it may take hours to repair the database and get it back online Setting read_only in my cnf on the slave will avoid this but given the dire we prefer to have as many checks as possible We provide a but the wrapper functions like please read the documentation for tableName() and addQuotes(). You will need both of them. ------------------------------------------------------------------------ Basic query optimisation ------------------------------------------------------------------------ MediaWiki developers who need to write DB queries should have some understanding of databases and the performance issues associated with them. Patches containing unacceptably slow features will not be accepted. Unindexed queries are generally not welcome in MediaWiki
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
the array() calling protocol came about after MediaWiki 1.4rc1.
static configuration should be added through ResourceLoaderGetConfigVars instead & $vars
The index of the header message $result[1]=The index of the body text message $result[2 through n]=Parameters passed to body text message. Please note the header message cannot receive/use parameters. 'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. Return false to stop further processing of the tag $reader:XMLReader object $logInfo:Array of information 'ImportHandlePageXMLTag':When parsing a XML tag in a page. Return false to stop further processing of the tag $reader:XMLReader object & $pageInfo:Array of information 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. Return false to stop further processing of the tag $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. Return false to stop further processing of the tag $reader:XMLReader object 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. Return false to stop further processing of the tag $reader:XMLReader object $revisionInfo:Array of information 'ImportLogInterwikiLink':Hook to change the interwiki link used in log entries and edit summaries for transwiki imports. & $fullInterwikiPrefix:Interwiki prefix, may contain colons. & $pageTitle:String that contains page title. 'ImportSources':Called when reading from the $wgImportSources configuration variable. Can be used to lazy-load the import sources list. & $importSources:The value of $wgImportSources. Modify as necessary. See the comment in DefaultSettings.php for the detail of how to structure this array. 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. & $title:Title object for the current page & $request:WebRequest & $ignoreRedirect:boolean to skip redirect check & $target:Title/string of redirect target & $article:Article object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) & $article:article(object) being checked 'IsTrustedProxy':Override the result of IP::isTrustedProxy() & $ip:IP being check & $result:Change this value to override the result of IP::isTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of Sanitizer::validateEmail(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetMagic':DEPRECATED! Use $magicWords in a file listed in $wgExtensionMessagesFiles instead. Use this to define synonyms of magic words depending of the language & $magicExtensions:associative array of magic words synonyms $lang:language code(string) 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetSpecialPageAliases':DEPRECATED! Use $specialPageAliases in a file listed in $wgExtensionMessagesFiles instead. Use to define aliases of special pages names depending of the language & $specialPageAliases:associative array of magic words synonyms $lang:language code(string) 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code:language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Associative array mapping language codes to prefixed links of the form "language:title". & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LanguageSelector':Hook to change the language selector available on a page. $out:The output page. $cssClassName:CSS class name of the language selector. 'LinkBegin':DEPRECATED! Use HtmlPageLinkRendererBegin instead. Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
This code would result in ircNotify being run twice when an article is and once for brion Hooks can return three possible true was required This is the default since MediaWiki *some string
this hook is for auditing only RecentChangesLinked and Watchlist RecentChangesLinked and Watchlist e g Watchlist removed from all revisions and log entries to which it was applied This gives extensions a chance to take it off their books as the deletion has already been partly carried out by this point or something similar the user will be unable to create the tag set and then return false from the hook function Ensure you consume the ChangeTagAfterDelete hook to carry out custom deletion actions as context called by AbstractContent::getParserOutput May be used to override the normal model specific rendering of page content as context as context $options
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped noclasses & $ret
Allows to change the fields on the form that will be generated $name
returning false will NOT prevent logging $e
if(count( $args)==0) $dir
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php