includes/installer/MysqlInstaller.php

   1 <?php
   2 /**
   3  * MySQL-specific installer.
   4  *
   5  * @file
   6  * @ingroup Deployment
   7  */
   8
   9 /**
  10  * Class for setting up the MediaWiki database using MySQL.
  11  *
  12  * @ingroup Deployment
  13  * @since 1.17
  14  */
  15 class MysqlInstaller extends DatabaseInstaller {
  16
  17         protected $globalNames = array(
  18                 'wgDBserver',
  19                 'wgDBname',
  20                 'wgDBuser',
  21                 'wgDBpassword',
  22                 'wgDBprefix',
  23                 'wgDBTableOptions',
  24                 'wgDBmysql5',
  25         );
  26
  27         protected $internalDefaults = array(
  28                 '_MysqlEngine' => 'InnoDB',
  29                 '_MysqlCharset' => 'binary',
  30                 '_InstallUser' => 'root',
  31         );
  32
  33         public $supportedEngines = array( 'InnoDB', 'MyISAM' );
  34
  35         public $minimumVersion = '4.0.14';
  36
  37         public $webUserPrivs = array(
  38                 'DELETE',
  39                 'INSERT',
  40                 'SELECT',
  41                 'UPDATE',
  42                 'CREATE TEMPORARY TABLES',
  43         );
  44
  45         /**
  46          * @return string
  47          */
  48         public function getName() {
  49                 return 'mysql';
  50         }
  51
  52         public function __construct( $parent ) {
  53                 parent::__construct( $parent );
  54         }
  55
  56         /**
  57          * @return Bool
  58          */
  59         public function isCompiled() {
  60                 return self::checkExtension( 'mysql' );
  61         }
  62
  63         /**
  64          * @return array
  65          */
  66         public function getGlobalDefaults() {
  67                 return array();
  68         }
  69
  70         /**
  71          * @return string
  72          */
  73         public function getConnectForm() {
  74                 return
  75                         $this->getTextBox( 'wgDBserver', 'config-db-host', array(), $this->parent->getHelpBox( 'config-db-host-help' ) ) .
  76                         Html::openElement( 'fieldset' ) .
  77                         Html::element( 'legend', array(), wfMsg( 'config-db-wiki-settings' ) ) .
  78                         $this->getTextBox( 'wgDBname', 'config-db-name', array( 'dir' => 'ltr' ), $this->parent->getHelpBox( 'config-db-name-help' ) ) .
  79                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix', array( 'dir' => 'ltr' ), $this->parent->getHelpBox( 'config-db-prefix-help' ) ) .
  80                         Html::closeElement( 'fieldset' ) .
  81                         $this->getInstallUserBox();
  82         }
  83
  84         public function submitConnectForm() {
  85                 // Get variables from the request.
  86                 $newValues = $this->setVarsFromRequest( array( 'wgDBserver', 'wgDBname', 'wgDBprefix' ) );
  87
  88                 // Validate them.
  89                 $status = Status::newGood();
  90                 if ( !strlen( $newValues['wgDBserver'] ) ) {
  91                         $status->fatal( 'config-missing-db-host' );
  92                 }
  93                 if ( !strlen( $newValues['wgDBname'] ) ) {
  94                         $status->fatal( 'config-missing-db-name' );
  95                 } elseif ( !preg_match( '/^[a-z0-9_-]+$/i', $newValues['wgDBname'] ) ) {
  96                         $status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
  97                 }
  98                 if ( !preg_match( '/^[a-z0-9_-]*$/i', $newValues['wgDBprefix'] ) ) {
  99                         $status->fatal( 'config-invalid-db-prefix', $newValues['wgDBprefix'] );
 100                 }
 101                 if ( !$status->isOK() ) {
 102                         return $status;
 103                 }
 104
 105                 // Submit user box
 106                 $status = $this->submitInstallUserBox();
 107                 if ( !$status->isOK() ) {
 108                         return $status;
 109                 }
 110
 111                 // Try to connect
 112                 $status = $this->getConnection();
 113                 if ( !$status->isOK() ) {
 114                         return $status;
 115                 }
 116                 /**
 117                  * @var $conn DatabaseBase
 118                  */
 119                 $conn = $status->value;
 120
 121                 // Check version
 122                 $version = $conn->getServerVersion();
 123                 if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
 124                         return Status::newFatal( 'config-mysql-old', $this->minimumVersion, $version );
 125                 }
 126
 127                 return $status;
 128         }
 129
 130         /**
 131          * @return Status
 132          */
 133         public function openConnection() {
 134                 $status = Status::newGood();
 135                 try {
 136                         $db = new DatabaseMysql(
 137                                 $this->getVar( 'wgDBserver' ),
 138                                 $this->getVar( '_InstallUser' ),
 139                                 $this->getVar( '_InstallPassword' ),
 140                                 false,
 141                                 false,
 142                                 0,
 143                                 $this->getVar( 'wgDBprefix' )
 144                         );
 145                         $status->value = $db;
 146                 } catch ( DBConnectionError $e ) {
 147                         $status->fatal( 'config-connection-error', $e->getMessage() );
 148                 }
 149                 return $status;
 150         }
 151
 152         public function preUpgrade() {
 153                 global $wgDBuser, $wgDBpassword;
 154
 155                 $status = $this->getConnection();
 156                 if ( !$status->isOK() ) {
 157                         $this->parent->showStatusError( $status );
 158                         return;
 159                 }
 160                 /**
 161                  * @var $conn DatabaseBase
 162                  */
 163                 $conn = $status->value;
 164                 $conn->selectDB( $this->getVar( 'wgDBname' ) );
 165
 166                 # Determine existing default character set
 167                 if ( $conn->tableExists( "revision", __METHOD__ ) ) {
 168                         $revision = $conn->buildLike( $this->getVar( 'wgDBprefix' ) . 'revision' );
 169                         $res = $conn->query( "SHOW TABLE STATUS $revision", __METHOD__ );
 170                         $row = $conn->fetchObject( $res );
 171                         if ( !$row ) {
 172                                 $this->parent->showMessage( 'config-show-table-status' );
 173                                 $existingSchema = false;
 174                                 $existingEngine = false;
 175                         } else {
 176                                 if ( preg_match( '/^latin1/', $row->Collation ) ) {
 177                                         $existingSchema = 'mysql4';
 178                                 } elseif ( preg_match( '/^utf8/', $row->Collation ) ) {
 179                                         $existingSchema = 'utf8';
 180                                 } elseif ( preg_match( '/^binary/', $row->Collation ) ) {
 181                                         $existingSchema = 'binary';
 182                                 } else {
 183                                         $existingSchema = false;
 184                                         $this->parent->showMessage( 'config-unknown-collation' );
 185                                 }
 186                                 if ( isset( $row->Engine ) ) {
 187                                         $existingEngine = $row->Engine;
 188                                 } else {
 189                                         $existingEngine = $row->Type;
 190                                 }
 191                         }
 192                 } else {
 193                         $existingSchema = false;
 194                         $existingEngine = false;
 195                 }
 196
 197                 if ( $existingSchema && $existingSchema != $this->getVar( '_MysqlCharset' ) ) {
 198                         $this->setVar( '_MysqlCharset', $existingSchema );
 199                 }
 200                 if ( $existingEngine && $existingEngine != $this->getVar( '_MysqlEngine' ) ) {
 201                         $this->setVar( '_MysqlEngine', $existingEngine );
 202                 }
 203
 204                 # Normal user and password are selected after this step, so for now
 205                 # just copy these two
 206                 $wgDBuser = $this->getVar( '_InstallUser' );
 207                 $wgDBpassword = $this->getVar( '_InstallPassword' );
 208         }
 209
 210         /**
 211          * Get a list of storage engines that are available and supported
 212          *
 213          * @return array
 214          */
 215         public function getEngines() {
 216                 $engines = array( 'InnoDB', 'MyISAM' );
 217                 $status = $this->getConnection();
 218                 if ( !$status->isOK() ) {
 219                         return $engines;
 220                 }
 221                 /**
 222                  * @var $conn DatabaseBase
 223                  */
 224                 $conn = $status->value;
 225
 226                 $version = $conn->getServerVersion();
 227                 if ( version_compare( $version, "4.1.2", "<" ) ) {
 228                         // No SHOW ENGINES in this version
 229                         return $engines;
 230                 }
 231
 232                 $engines = array();
 233                 $res = $conn->query( 'SHOW ENGINES', __METHOD__ );
 234                 foreach ( $res as $row ) {
 235                         if ( $row->Support == 'YES' || $row->Support == 'DEFAULT' ) {
 236                                 $engines[] = $row->Engine;
 237                         }
 238                 }
 239                 $engines = array_intersect( $this->supportedEngines, $engines );
 240                 return $engines;
 241         }
 242
 243         /**
 244          * Get a list of character sets that are available and supported
 245          *
 246          * @return array
 247          */
 248         public function getCharsets() {
 249                 $status = $this->getConnection();
 250                 $mysql5 = array( 'binary', 'utf8' );
 251                 $mysql4 = array( 'mysql4' );
 252                 if ( !$status->isOK() ) {
 253                         return $mysql5;
 254                 }
 255                 if ( version_compare( $status->value->getServerVersion(), '4.1.0', '>=' ) ) {
 256                         return $mysql5;
 257                 }
 258                 return $mysql4;
 259         }
 260
 261         /**
 262          * Return true if the install user can create accounts
 263          *
 264          * @return bool
 265          */
 266         public function canCreateAccounts() {
 267                 $status = $this->getConnection();
 268                 if ( !$status->isOK() ) {
 269                         return false;
 270                 }
 271                 /**
 272                  * @var $conn DatabaseBase
 273                  */
 274                 $conn = $status->value;
 275
 276                 // Check version, need INFORMATION_SCHEMA and CREATE USER
 277                 if ( version_compare( $conn->getServerVersion(), '5.0.2', '<' ) ) {
 278                         return false;
 279                 }
 280
 281                 // Get current account name
 282                 $currentName = $conn->selectField( '', 'CURRENT_USER()', '', __METHOD__ );
 283                 $parts = explode( '@', $currentName );
 284                 if ( count( $parts ) != 2 ) {
 285                         return false;
 286                 }
 287                 $quotedUser = $conn->addQuotes( $parts[0] ) .
 288                         '@' . $conn->addQuotes( $parts[1] );
 289
 290                 // The user needs to have INSERT on mysql.* to be able to CREATE USER
 291                 // The grantee will be double-quoted in this query, as required
 292                 $res = $conn->select( 'INFORMATION_SCHEMA.USER_PRIVILEGES', '*',
 293                         array( 'GRANTEE' => $quotedUser ), __METHOD__ );
 294                 $insertMysql = false;
 295                 $grantOptions = array_flip( $this->webUserPrivs );
 296                 foreach ( $res as $row ) {
 297                         if ( $row->PRIVILEGE_TYPE == 'INSERT' ) {
 298                                 $insertMysql = true;
 299                         }
 300                         if ( $row->IS_GRANTABLE ) {
 301                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 302                         }
 303                 }
 304
 305                 // Check for DB-specific privs for mysql.*
 306                 if ( !$insertMysql ) {
 307                         $row = $conn->selectRow( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 308                                 array(
 309                                         'GRANTEE' => $quotedUser,
 310                                         'TABLE_SCHEMA' => 'mysql',
 311                                         'PRIVILEGE_TYPE' => 'INSERT',
 312                                 ), __METHOD__ );
 313                         if ( $row ) {
 314                                 $insertMysql = true;
 315                         }
 316                 }
 317
 318                 if ( !$insertMysql ) {
 319                         return false;
 320                 }
 321
 322                 // Check for DB-level grant options
 323                 $res = $conn->select( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 324                         array(
 325                                 'GRANTEE' => $quotedUser,
 326                                 'IS_GRANTABLE' => 1,
 327                         ), __METHOD__ );
 328                 foreach ( $res as $row ) {
 329                         $regex = $conn->likeToRegex( $row->TABLE_SCHEMA );
 330                         if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 331                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 332                         }
 333                 }
 334                 if ( count( $grantOptions ) ) {
 335                         // Can't grant everything
 336                         return false;
 337                 }
 338                 return true;
 339         }
 340
 341         /**
 342          * @return string
 343          */
 344         public function getSettingsForm() {
 345                 if ( $this->canCreateAccounts() ) {
 346                         $noCreateMsg = false;
 347                 } else {
 348                         $noCreateMsg = 'config-db-web-no-create-privs';
 349                 }
 350                 $s = $this->getWebUserBox( $noCreateMsg );
 351
 352                 // Do engine selector
 353                 $engines = $this->getEngines();
 354                 // If the current default engine is not supported, use an engine that is
 355                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 356                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 357                 }
 358
 359                 $s .= Xml::openElement( 'div', array(
 360                         'id' => 'dbMyisamWarning'
 361                 ));
 362                 $s .= $this->parent->getWarningBox( wfMsg( 'config-mysql-myisam-dep' ) );
 363                 $s .= Xml::closeElement( 'div' );
 364
 365                 if( $this->getVar( '_MysqlEngine' ) != 'MyISAM' ) {
 366                         $s .= Xml::openElement( 'script', array( 'type' => 'text/javascript' ) );
 367                         $s .= '$(\'#dbMyisamWarning\').hide();';
 368                         $s .= Xml::closeElement( 'script' );
 369                 }
 370
 371                 if ( count( $engines ) >= 2 ) {
 372                         $s .= $this->getRadioSet( array(
 373                                 'var' => '_MysqlEngine',
 374                                 'label' => 'config-mysql-engine',
 375                                 'itemLabelPrefix' => 'config-mysql-',
 376                                 'values' => $engines,
 377                                 'itemAttribs' => array(
 378                                         'MyISAM' => array(
 379                                                 'class' => 'showHideRadio',
 380                                                 'rel'   => 'dbMyisamWarning'),
 381                                         'InnoDB' => array(
 382                                                 'class' => 'hideShowRadio',
 383                                                 'rel'   => 'dbMyisamWarning')
 384                         )));
 385                         $s .= $this->parent->getHelpBox( 'config-mysql-engine-help' );
 386                 }
 387
 388                 // If the current default charset is not supported, use a charset that is
 389                 $charsets = $this->getCharsets();
 390                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 391                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 392                 }
 393
 394                 // Do charset selector
 395                 if ( count( $charsets ) >= 2 ) {
 396                         $s .= $this->getRadioSet( array(
 397                                 'var' => '_MysqlCharset',
 398                                 'label' => 'config-mysql-charset',
 399                                 'itemLabelPrefix' => 'config-mysql-',
 400                                 'values' => $charsets
 401                         ));
 402                         $s .= $this->parent->getHelpBox( 'config-mysql-charset-help' );
 403                 }
 404
 405                 return $s;
 406         }
 407
 408         /**
 409          * @return Status
 410          */
 411         public function submitSettingsForm() {
 412                 $this->setVarsFromRequest( array( '_MysqlEngine', '_MysqlCharset' ) );
 413                 $status = $this->submitWebUserBox();
 414                 if ( !$status->isOK() ) {
 415                         return $status;
 416                 }
 417
 418                 // Validate the create checkbox
 419                 $canCreate = $this->canCreateAccounts();
 420                 if ( !$canCreate ) {
 421                         $this->setVar( '_CreateDBAccount', false );
 422                         $create = false;
 423                 } else {
 424                         $create = $this->getVar( '_CreateDBAccount' );
 425                 }
 426
 427                 if ( !$create ) {
 428                         // Test the web account
 429                         try {
 430                                 new DatabaseMysql(
 431                                         $this->getVar( 'wgDBserver' ),
 432                                         $this->getVar( 'wgDBuser' ),
 433                                         $this->getVar( 'wgDBpassword' ),
 434                                         false,
 435                                         false,
 436                                         0,
 437                                         $this->getVar( 'wgDBprefix' )
 438                                 );
 439                         } catch ( DBConnectionError $e ) {
 440                                 return Status::newFatal( 'config-connection-error', $e->getMessage() );
 441                         }
 442                 }
 443
 444                 // Validate engines and charsets
 445                 // This is done pre-submit already so it's just for security
 446                 $engines = $this->getEngines();
 447                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 448                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 449                 }
 450                 $charsets = $this->getCharsets();
 451                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 452                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 453                 }
 454                 return Status::newGood();
 455         }
 456
 457         public function preInstall() {
 458                 # Add our user callback to installSteps, right before the tables are created.
 459                 $callback = array(
 460                         'name' => 'user',
 461                         'callback' => array( $this, 'setupUser' ),
 462                 );
 463                 $this->parent->addInstallStep( $callback, 'tables' );
 464         }
 465
 466         /**
 467          * @return Status
 468          */
 469         public function setupDatabase() {
 470                 $status = $this->getConnection();
 471                 if ( !$status->isOK() ) {
 472                         return $status;
 473                 }
 474                 $conn = $status->value;
 475                 $dbName = $this->getVar( 'wgDBname' );
 476                 if( !$conn->selectDB( $dbName ) ) {
 477                         $conn->query( "CREATE DATABASE " . $conn->addIdentifierQuotes( $dbName ), __METHOD__ );
 478                         $conn->selectDB( $dbName );
 479                 }
 480                 $this->setupSchemaVars();
 481                 return $status;
 482         }
 483
 484         /**
 485          * @return Status
 486          */
 487         public function setupUser() {
 488                 $dbUser = $this->getVar( 'wgDBuser' );
 489                 if( $dbUser == $this->getVar( '_InstallUser' ) ) {
 490                         return Status::newGood();
 491                 }
 492                 $status = $this->getConnection();
 493                 if ( !$status->isOK() ) {
 494                         return $status;
 495                 }
 496
 497                 $this->setupSchemaVars();
 498                 $dbName = $this->getVar( 'wgDBname' );
 499                 $this->db->selectDB( $dbName );
 500                 $server = $this->getVar( 'wgDBserver' );
 501                 $password = $this->getVar( 'wgDBpassword' );
 502                 $grantableNames = array();
 503
 504                 if ( $this->getVar( '_CreateDBAccount' ) ) {
 505                         // Before we blindly try to create a user that already has access,
 506                         try { // first attempt to connect to the database
 507                                 new DatabaseMysql(
 508                                         $server,
 509                                         $dbUser,
 510                                         $password,
 511                                         false,
 512                                         false,
 513                                         0,
 514                                         $this->getVar( 'wgDBprefix' )
 515                                 );
 516                                 $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 517                                 $tryToCreate = false;
 518                         } catch ( DBConnectionError $e ) {
 519                                 $tryToCreate = true;
 520                         }
 521                 } else {
 522                         $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 523                         $tryToCreate = false;
 524                 }
 525
 526                 if( $tryToCreate ) {
 527                         $createHostList = array($server,
 528                                 'localhost',
 529                                 'localhost.localdomain',
 530                                 '%'
 531                         );
 532
 533                         $createHostList = array_unique( $createHostList );
 534                         $escPass = $this->db->addQuotes( $password );
 535
 536                         foreach( $createHostList as $host ) {
 537                                 $fullName = $this->buildFullUserName( $dbUser, $host );
 538                                 if( !$this->userDefinitelyExists( $dbUser, $host ) ) {
 539                                         try{
 540                                                 $this->db->begin();
 541                                                 $this->db->query( "CREATE USER $fullName IDENTIFIED BY $escPass", __METHOD__ );
 542                                                 $this->db->commit();
 543                                                 $grantableNames[] = $fullName;
 544                                         } catch( DBQueryError $dqe ) {
 545                                                 if( $this->db->lastErrno() == 1396 /* ER_CANNOT_USER */ ) {
 546                                                         // User (probably) already exists
 547                                                         $this->db->rollback();
 548                                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 549                                                         $grantableNames[] = $fullName;
 550                                                         break;
 551                                                 } else {
 552                                                         // If we couldn't create for some bizzare reason and the
 553                                                         // user probably doesn't exist, skip the grant
 554                                                         $this->db->rollback();
 555                                                         $status->warning( 'config-install-user-create-failed', $dbUser, $dqe->getText() );
 556                                                 }
 557                                         }
 558                                 } else {
 559                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 560                                         $grantableNames[] = $fullName;
 561                                         break;
 562                                 }
 563                         }
 564                 }
 565
 566                 // Try to grant to all the users we know exist or we were able to create
 567                 $dbAllTables = $this->db->addIdentifierQuotes( $dbName ) . '.*';
 568                 foreach( $grantableNames as $name ) {
 569                         try {
 570                                 $this->db->begin();
 571                                 $this->db->query( "GRANT ALL PRIVILEGES ON $dbAllTables TO $name", __METHOD__ );
 572                                 $this->db->commit();
 573                         } catch( DBQueryError $dqe ) {
 574                                 $this->db->rollback();
 575                                 $status->fatal( 'config-install-user-grant-failed', $dbUser, $dqe->getText() );
 576                         }
 577                 }
 578
 579                 return $status;
 580         }
 581
 582         /**
 583          * Return a formal 'User'@'Host' username for use in queries
 584          * @param $name String Username, quotes will be added
 585          * @param $host String Hostname, quotes will be added
 586          * @return String
 587          */
 588         private function buildFullUserName( $name, $host ) {
 589                 return $this->db->addQuotes( $name ) . '@' . $this->db->addQuotes( $host );
 590         }
 591
 592         /**
 593          * Try to see if the user account exists. Our "superuser" may not have
 594          * access to mysql.user, so false means "no" or "maybe"
 595          * @param $host String Hostname to check
 596          * @param $user String Username to check
 597          * @return boolean
 598          */
 599         private function userDefinitelyExists( $host, $user ) {
 600                 try {
 601                         $res = $this->db->selectRow( 'mysql.user', array( 'Host', 'User' ),
 602                                 array( 'Host' => $host, 'User' => $user ), __METHOD__ );
 603                         return (bool)$res;
 604                 } catch( DBQueryError $dqe ) {
 605                         return false;
 606                 }
 607
 608         }
 609
 610         /**
 611          * Return any table options to be applied to all tables that don't
 612          * override them.
 613          *
 614          * @return String
 615          */
 616         protected function getTableOptions() {
 617                 $options = array();
 618                 if ( $this->getVar( '_MysqlEngine' ) !== null ) {
 619                         $options[] = "ENGINE=" . $this->getVar( '_MysqlEngine' );
 620                 }
 621                 if ( $this->getVar( '_MysqlCharset' ) !== null ) {
 622                         $options[] = 'DEFAULT CHARSET=' . $this->getVar( '_MysqlCharset' );
 623                 }
 624                 return implode( ', ', $options );
 625         }
 626
 627         /**
 628          * Get variables to substitute into tables.sql and the SQL patch files.
 629          *
 630          * @return array
 631          */
 632         public function getSchemaVars() {
 633                 return array(
 634                         'wgDBTableOptions' => $this->getTableOptions(),
 635                         'wgDBname' => $this->getVar( 'wgDBname' ),
 636                         'wgDBuser' => $this->getVar( 'wgDBuser' ),
 637                         'wgDBpassword' => $this->getVar( 'wgDBpassword' ),
 638                 );
 639         }
 640
 641         public function getLocalSettings() {
 642                 $dbmysql5 = wfBoolToStr( $this->getVar( 'wgDBmysql5', true ) );
 643                 $prefix = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBprefix' ) );
 644                 $tblOpts = LocalSettingsGenerator::escapePhpString( $this->getTableOptions() );
 645                 return
 646 "# MySQL specific settings
 647 \$wgDBprefix         = \"{$prefix}\";
 648
 649 # MySQL table options to use during installation or update
 650 \$wgDBTableOptions   = \"{$tblOpts}\";
 651
 652 # Experimental charset support for MySQL 4.1/5.0.
 653 \$wgDBmysql5 = {$dbmysql5};";
 654         }
 655 }