includes/installer/MysqlInstaller.php

   1 <?php
   2 /**
   3  * MySQL-specific installer.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Deployment
  22  */
  23
  24 /**
  25  * Class for setting up the MediaWiki database using MySQL.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class MysqlInstaller extends DatabaseInstaller {
  31
  32         protected $globalNames = array(
  33                 'wgDBserver',
  34                 'wgDBname',
  35                 'wgDBuser',
  36                 'wgDBpassword',
  37                 'wgDBprefix',
  38                 'wgDBTableOptions',
  39                 'wgDBmysql5',
  40         );
  41
  42         protected $internalDefaults = array(
  43                 '_MysqlEngine' => 'InnoDB',
  44                 '_MysqlCharset' => 'binary',
  45                 '_InstallUser' => 'root',
  46         );
  47
  48         public $supportedEngines = array( 'InnoDB', 'MyISAM' );
  49
  50         public $minimumVersion = '5.0.2';
  51
  52         public $webUserPrivs = array(
  53                 'DELETE',
  54                 'INSERT',
  55                 'SELECT',
  56                 'UPDATE',
  57                 'CREATE TEMPORARY TABLES',
  58         );
  59
  60         /**
  61          * @return string
  62          */
  63         public function getName() {
  64                 return 'mysql';
  65         }
  66
  67         public function __construct( $parent ) {
  68                 parent::__construct( $parent );
  69         }
  70
  71         /**
  72          * @return Bool
  73          */
  74         public function isCompiled() {
  75                 return self::checkExtension( 'mysql' );
  76         }
  77
  78         /**
  79          * @return array
  80          */
  81         public function getGlobalDefaults() {
  82                 return array();
  83         }
  84
  85         /**
  86          * @return string
  87          */
  88         public function getConnectForm() {
  89                 return
  90                         $this->getTextBox( 'wgDBserver', 'config-db-host', array(), $this->parent->getHelpBox( 'config-db-host-help' ) ) .
  91                         Html::openElement( 'fieldset' ) .
  92                         Html::element( 'legend', array(), wfMsg( 'config-db-wiki-settings' ) ) .
  93                         $this->getTextBox( 'wgDBname', 'config-db-name', array( 'dir' => 'ltr' ), $this->parent->getHelpBox( 'config-db-name-help' ) ) .
  94                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix', array( 'dir' => 'ltr' ), $this->parent->getHelpBox( 'config-db-prefix-help' ) ) .
  95                         Html::closeElement( 'fieldset' ) .
  96                         $this->getInstallUserBox();
  97         }
  98
  99         public function submitConnectForm() {
 100                 // Get variables from the request.
 101                 $newValues = $this->setVarsFromRequest( array( 'wgDBserver', 'wgDBname', 'wgDBprefix' ) );
 102
 103                 // Validate them.
 104                 $status = Status::newGood();
 105                 if ( !strlen( $newValues['wgDBserver'] ) ) {
 106                         $status->fatal( 'config-missing-db-host' );
 107                 }
 108                 if ( !strlen( $newValues['wgDBname'] ) ) {
 109                         $status->fatal( 'config-missing-db-name' );
 110                 } elseif ( !preg_match( '/^[a-z0-9_-]+$/i', $newValues['wgDBname'] ) ) {
 111                         $status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
 112                 }
 113                 if ( !preg_match( '/^[a-z0-9_-]*$/i', $newValues['wgDBprefix'] ) ) {
 114                         $status->fatal( 'config-invalid-db-prefix', $newValues['wgDBprefix'] );
 115                 }
 116                 if ( !$status->isOK() ) {
 117                         return $status;
 118                 }
 119
 120                 // Submit user box
 121                 $status = $this->submitInstallUserBox();
 122                 if ( !$status->isOK() ) {
 123                         return $status;
 124                 }
 125
 126                 // Try to connect
 127                 $status = $this->getConnection();
 128                 if ( !$status->isOK() ) {
 129                         return $status;
 130                 }
 131                 /**
 132                  * @var $conn DatabaseBase
 133                  */
 134                 $conn = $status->value;
 135
 136                 // Check version
 137                 $version = $conn->getServerVersion();
 138                 if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
 139                         return Status::newFatal( 'config-mysql-old', $this->minimumVersion, $version );
 140                 }
 141
 142                 return $status;
 143         }
 144
 145         /**
 146          * @return Status
 147          */
 148         public function openConnection() {
 149                 $status = Status::newGood();
 150                 try {
 151                         $db = new DatabaseMysql(
 152                                 $this->getVar( 'wgDBserver' ),
 153                                 $this->getVar( '_InstallUser' ),
 154                                 $this->getVar( '_InstallPassword' ),
 155                                 false,
 156                                 false,
 157                                 0,
 158                                 $this->getVar( 'wgDBprefix' )
 159                         );
 160                         $status->value = $db;
 161                 } catch ( DBConnectionError $e ) {
 162                         $status->fatal( 'config-connection-error', $e->getMessage() );
 163                 }
 164                 return $status;
 165         }
 166
 167         public function preUpgrade() {
 168                 global $wgDBuser, $wgDBpassword;
 169
 170                 $status = $this->getConnection();
 171                 if ( !$status->isOK() ) {
 172                         $this->parent->showStatusError( $status );
 173                         return;
 174                 }
 175                 /**
 176                  * @var $conn DatabaseBase
 177                  */
 178                 $conn = $status->value;
 179                 $conn->selectDB( $this->getVar( 'wgDBname' ) );
 180
 181                 # Determine existing default character set
 182                 if ( $conn->tableExists( "revision", __METHOD__ ) ) {
 183                         $revision = $conn->buildLike( $this->getVar( 'wgDBprefix' ) . 'revision' );
 184                         $res = $conn->query( "SHOW TABLE STATUS $revision", __METHOD__ );
 185                         $row = $conn->fetchObject( $res );
 186                         if ( !$row ) {
 187                                 $this->parent->showMessage( 'config-show-table-status' );
 188                                 $existingSchema = false;
 189                                 $existingEngine = false;
 190                         } else {
 191                                 if ( preg_match( '/^latin1/', $row->Collation ) ) {
 192                                         $existingSchema = 'latin1';
 193                                 } elseif ( preg_match( '/^utf8/', $row->Collation ) ) {
 194                                         $existingSchema = 'utf8';
 195                                 } elseif ( preg_match( '/^binary/', $row->Collation ) ) {
 196                                         $existingSchema = 'binary';
 197                                 } else {
 198                                         $existingSchema = false;
 199                                         $this->parent->showMessage( 'config-unknown-collation' );
 200                                 }
 201                                 if ( isset( $row->Engine ) ) {
 202                                         $existingEngine = $row->Engine;
 203                                 } else {
 204                                         $existingEngine = $row->Type;
 205                                 }
 206                         }
 207                 } else {
 208                         $existingSchema = false;
 209                         $existingEngine = false;
 210                 }
 211
 212                 if ( $existingSchema && $existingSchema != $this->getVar( '_MysqlCharset' ) ) {
 213                         $this->setVar( '_MysqlCharset', $existingSchema );
 214                 }
 215                 if ( $existingEngine && $existingEngine != $this->getVar( '_MysqlEngine' ) ) {
 216                         $this->setVar( '_MysqlEngine', $existingEngine );
 217                 }
 218
 219                 # Normal user and password are selected after this step, so for now
 220                 # just copy these two
 221                 $wgDBuser = $this->getVar( '_InstallUser' );
 222                 $wgDBpassword = $this->getVar( '_InstallPassword' );
 223         }
 224
 225         /**
 226          * Get a list of storage engines that are available and supported
 227          *
 228          * @return array
 229          */
 230         public function getEngines() {
 231                 $status = $this->getConnection();
 232
 233                 /**
 234                  * @var $conn DatabaseBase
 235                  */
 236                 $conn = $status->value;
 237
 238                 $engines = array();
 239                 $res = $conn->query( 'SHOW ENGINES', __METHOD__ );
 240                 foreach ( $res as $row ) {
 241                         if ( $row->Support == 'YES' || $row->Support == 'DEFAULT' ) {
 242                                 $engines[] = $row->Engine;
 243                         }
 244                 }
 245                 $engines = array_intersect( $this->supportedEngines, $engines );
 246                 return $engines;
 247         }
 248
 249         /**
 250          * Get a list of character sets that are available and supported
 251          *
 252          * @return array
 253          */
 254         public function getCharsets() {
 255                 return array( 'binary', 'utf8' );
 256         }
 257
 258         /**
 259          * Return true if the install user can create accounts
 260          *
 261          * @return bool
 262          */
 263         public function canCreateAccounts() {
 264                 $status = $this->getConnection();
 265                 if ( !$status->isOK() ) {
 266                         return false;
 267                 }
 268                 /**
 269                  * @var $conn DatabaseBase
 270                  */
 271                 $conn = $status->value;
 272
 273                 // Get current account name
 274                 $currentName = $conn->selectField( '', 'CURRENT_USER()', '', __METHOD__ );
 275                 $parts = explode( '@', $currentName );
 276                 if ( count( $parts ) != 2 ) {
 277                         return false;
 278                 }
 279                 $quotedUser = $conn->addQuotes( $parts[0] ) .
 280                         '@' . $conn->addQuotes( $parts[1] );
 281
 282                 // The user needs to have INSERT on mysql.* to be able to CREATE USER
 283                 // The grantee will be double-quoted in this query, as required
 284                 $res = $conn->select( 'INFORMATION_SCHEMA.USER_PRIVILEGES', '*',
 285                         array( 'GRANTEE' => $quotedUser ), __METHOD__ );
 286                 $insertMysql = false;
 287                 $grantOptions = array_flip( $this->webUserPrivs );
 288                 foreach ( $res as $row ) {
 289                         if ( $row->PRIVILEGE_TYPE == 'INSERT' ) {
 290                                 $insertMysql = true;
 291                         }
 292                         if ( $row->IS_GRANTABLE ) {
 293                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 294                         }
 295                 }
 296
 297                 // Check for DB-specific privs for mysql.*
 298                 if ( !$insertMysql ) {
 299                         $row = $conn->selectRow( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 300                                 array(
 301                                         'GRANTEE' => $quotedUser,
 302                                         'TABLE_SCHEMA' => 'mysql',
 303                                         'PRIVILEGE_TYPE' => 'INSERT',
 304                                 ), __METHOD__ );
 305                         if ( $row ) {
 306                                 $insertMysql = true;
 307                         }
 308                 }
 309
 310                 if ( !$insertMysql ) {
 311                         return false;
 312                 }
 313
 314                 // Check for DB-level grant options
 315                 $res = $conn->select( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 316                         array(
 317                                 'GRANTEE' => $quotedUser,
 318                                 'IS_GRANTABLE' => 1,
 319                         ), __METHOD__ );
 320                 foreach ( $res as $row ) {
 321                         $regex = $conn->likeToRegex( $row->TABLE_SCHEMA );
 322                         if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 323                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 324                         }
 325                 }
 326                 if ( count( $grantOptions ) ) {
 327                         // Can't grant everything
 328                         return false;
 329                 }
 330                 return true;
 331         }
 332
 333         /**
 334          * @return string
 335          */
 336         public function getSettingsForm() {
 337                 if ( $this->canCreateAccounts() ) {
 338                         $noCreateMsg = false;
 339                 } else {
 340                         $noCreateMsg = 'config-db-web-no-create-privs';
 341                 }
 342                 $s = $this->getWebUserBox( $noCreateMsg );
 343
 344                 // Do engine selector
 345                 $engines = $this->getEngines();
 346                 // If the current default engine is not supported, use an engine that is
 347                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 348                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 349                 }
 350
 351                 $s .= Xml::openElement( 'div', array(
 352                         'id' => 'dbMyisamWarning'
 353                 ));
 354                 $s .= $this->parent->getWarningBox( wfMsg( 'config-mysql-myisam-dep' ) );
 355                 $s .= Xml::closeElement( 'div' );
 356
 357                 if( $this->getVar( '_MysqlEngine' ) != 'MyISAM' ) {
 358                         $s .= Xml::openElement( 'script', array( 'type' => 'text/javascript' ) );
 359                         $s .= '$(\'#dbMyisamWarning\').hide();';
 360                         $s .= Xml::closeElement( 'script' );
 361                 }
 362
 363                 if ( count( $engines ) >= 2 ) {
 364                         $s .= $this->getRadioSet( array(
 365                                 'var' => '_MysqlEngine',
 366                                 'label' => 'config-mysql-engine',
 367                                 'itemLabelPrefix' => 'config-mysql-',
 368                                 'values' => $engines,
 369                                 'itemAttribs' => array(
 370                                         'MyISAM' => array(
 371                                                 'class' => 'showHideRadio',
 372                                                 'rel'   => 'dbMyisamWarning'),
 373                                         'InnoDB' => array(
 374                                                 'class' => 'hideShowRadio',
 375                                                 'rel'   => 'dbMyisamWarning')
 376                         )));
 377                         $s .= $this->parent->getHelpBox( 'config-mysql-engine-help' );
 378                 }
 379
 380                 // If the current default charset is not supported, use a charset that is
 381                 $charsets = $this->getCharsets();
 382                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 383                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 384                 }
 385
 386                 // Do charset selector
 387                 if ( count( $charsets ) >= 2 ) {
 388                         $s .= $this->getRadioSet( array(
 389                                 'var' => '_MysqlCharset',
 390                                 'label' => 'config-mysql-charset',
 391                                 'itemLabelPrefix' => 'config-mysql-',
 392                                 'values' => $charsets
 393                         ));
 394                         $s .= $this->parent->getHelpBox( 'config-mysql-charset-help' );
 395                 }
 396
 397                 return $s;
 398         }
 399
 400         /**
 401          * @return Status
 402          */
 403         public function submitSettingsForm() {
 404                 $this->setVarsFromRequest( array( '_MysqlEngine', '_MysqlCharset' ) );
 405                 $status = $this->submitWebUserBox();
 406                 if ( !$status->isOK() ) {
 407                         return $status;
 408                 }
 409
 410                 // Validate the create checkbox
 411                 $canCreate = $this->canCreateAccounts();
 412                 if ( !$canCreate ) {
 413                         $this->setVar( '_CreateDBAccount', false );
 414                         $create = false;
 415                 } else {
 416                         $create = $this->getVar( '_CreateDBAccount' );
 417                 }
 418
 419                 if ( !$create ) {
 420                         // Test the web account
 421                         try {
 422                                 new DatabaseMysql(
 423                                         $this->getVar( 'wgDBserver' ),
 424                                         $this->getVar( 'wgDBuser' ),
 425                                         $this->getVar( 'wgDBpassword' ),
 426                                         false,
 427                                         false,
 428                                         0,
 429                                         $this->getVar( 'wgDBprefix' )
 430                                 );
 431                         } catch ( DBConnectionError $e ) {
 432                                 return Status::newFatal( 'config-connection-error', $e->getMessage() );
 433                         }
 434                 }
 435
 436                 // Validate engines and charsets
 437                 // This is done pre-submit already so it's just for security
 438                 $engines = $this->getEngines();
 439                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 440                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 441                 }
 442                 $charsets = $this->getCharsets();
 443                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 444                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 445                 }
 446                 return Status::newGood();
 447         }
 448
 449         public function preInstall() {
 450                 # Add our user callback to installSteps, right before the tables are created.
 451                 $callback = array(
 452                         'name' => 'user',
 453                         'callback' => array( $this, 'setupUser' ),
 454                 );
 455                 $this->parent->addInstallStep( $callback, 'tables' );
 456         }
 457
 458         /**
 459          * @return Status
 460          */
 461         public function setupDatabase() {
 462                 $status = $this->getConnection();
 463                 if ( !$status->isOK() ) {
 464                         return $status;
 465                 }
 466                 $conn = $status->value;
 467                 $dbName = $this->getVar( 'wgDBname' );
 468                 if( !$conn->selectDB( $dbName ) ) {
 469                         $conn->query( "CREATE DATABASE " . $conn->addIdentifierQuotes( $dbName ), __METHOD__ );
 470                         $conn->selectDB( $dbName );
 471                 }
 472                 $this->setupSchemaVars();
 473                 return $status;
 474         }
 475
 476         /**
 477          * @return Status
 478          */
 479         public function setupUser() {
 480                 $dbUser = $this->getVar( 'wgDBuser' );
 481                 if( $dbUser == $this->getVar( '_InstallUser' ) ) {
 482                         return Status::newGood();
 483                 }
 484                 $status = $this->getConnection();
 485                 if ( !$status->isOK() ) {
 486                         return $status;
 487                 }
 488
 489                 $this->setupSchemaVars();
 490                 $dbName = $this->getVar( 'wgDBname' );
 491                 $this->db->selectDB( $dbName );
 492                 $server = $this->getVar( 'wgDBserver' );
 493                 $password = $this->getVar( 'wgDBpassword' );
 494                 $grantableNames = array();
 495
 496                 if ( $this->getVar( '_CreateDBAccount' ) ) {
 497                         // Before we blindly try to create a user that already has access,
 498                         try { // first attempt to connect to the database
 499                                 new DatabaseMysql(
 500                                         $server,
 501                                         $dbUser,
 502                                         $password,
 503                                         false,
 504                                         false,
 505                                         0,
 506                                         $this->getVar( 'wgDBprefix' )
 507                                 );
 508                                 $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 509                                 $tryToCreate = false;
 510                         } catch ( DBConnectionError $e ) {
 511                                 $tryToCreate = true;
 512                         }
 513                 } else {
 514                         $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 515                         $tryToCreate = false;
 516                 }
 517
 518                 if( $tryToCreate ) {
 519                         $createHostList = array($server,
 520                                 'localhost',
 521                                 'localhost.localdomain',
 522                                 '%'
 523                         );
 524
 525                         $createHostList = array_unique( $createHostList );
 526                         $escPass = $this->db->addQuotes( $password );
 527
 528                         foreach( $createHostList as $host ) {
 529                                 $fullName = $this->buildFullUserName( $dbUser, $host );
 530                                 if( !$this->userDefinitelyExists( $dbUser, $host ) ) {
 531                                         try{
 532                                                 $this->db->begin( __METHOD__ );
 533                                                 $this->db->query( "CREATE USER $fullName IDENTIFIED BY $escPass", __METHOD__ );
 534                                                 $this->db->commit( __METHOD__ );
 535                                                 $grantableNames[] = $fullName;
 536                                         } catch( DBQueryError $dqe ) {
 537                                                 if( $this->db->lastErrno() == 1396 /* ER_CANNOT_USER */ ) {
 538                                                         // User (probably) already exists
 539                                                         $this->db->rollback( __METHOD__ );
 540                                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 541                                                         $grantableNames[] = $fullName;
 542                                                         break;
 543                                                 } else {
 544                                                         // If we couldn't create for some bizzare reason and the
 545                                                         // user probably doesn't exist, skip the grant
 546                                                         $this->db->rollback( __METHOD__ );
 547                                                         $status->warning( 'config-install-user-create-failed', $dbUser, $dqe->getText() );
 548                                                 }
 549                                         }
 550                                 } else {
 551                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 552                                         $grantableNames[] = $fullName;
 553                                         break;
 554                                 }
 555                         }
 556                 }
 557
 558                 // Try to grant to all the users we know exist or we were able to create
 559                 $dbAllTables = $this->db->addIdentifierQuotes( $dbName ) . '.*';
 560                 foreach( $grantableNames as $name ) {
 561                         try {
 562                                 $this->db->begin( __METHOD__ );
 563                                 $this->db->query( "GRANT ALL PRIVILEGES ON $dbAllTables TO $name", __METHOD__ );
 564                                 $this->db->commit( __METHOD__ );
 565                         } catch( DBQueryError $dqe ) {
 566                                 $this->db->rollback( __METHOD__ );
 567                                 $status->fatal( 'config-install-user-grant-failed', $dbUser, $dqe->getText() );
 568                         }
 569                 }
 570
 571                 return $status;
 572         }
 573
 574         /**
 575          * Return a formal 'User'@'Host' username for use in queries
 576          * @param $name String Username, quotes will be added
 577          * @param $host String Hostname, quotes will be added
 578          * @return String
 579          */
 580         private function buildFullUserName( $name, $host ) {
 581                 return $this->db->addQuotes( $name ) . '@' . $this->db->addQuotes( $host );
 582         }
 583
 584         /**
 585          * Try to see if the user account exists. Our "superuser" may not have
 586          * access to mysql.user, so false means "no" or "maybe"
 587          * @param $host String Hostname to check
 588          * @param $user String Username to check
 589          * @return boolean
 590          */
 591         private function userDefinitelyExists( $host, $user ) {
 592                 try {
 593                         $res = $this->db->selectRow( 'mysql.user', array( 'Host', 'User' ),
 594                                 array( 'Host' => $host, 'User' => $user ), __METHOD__ );
 595                         return (bool)$res;
 596                 } catch( DBQueryError $dqe ) {
 597                         return false;
 598                 }
 599
 600         }
 601
 602         /**
 603          * Return any table options to be applied to all tables that don't
 604          * override them.
 605          *
 606          * @return String
 607          */
 608         protected function getTableOptions() {
 609                 $options = array();
 610                 if ( $this->getVar( '_MysqlEngine' ) !== null ) {
 611                         $options[] = "ENGINE=" . $this->getVar( '_MysqlEngine' );
 612                 }
 613                 if ( $this->getVar( '_MysqlCharset' ) !== null ) {
 614                         $options[] = 'DEFAULT CHARSET=' . $this->getVar( '_MysqlCharset' );
 615                 }
 616                 return implode( ', ', $options );
 617         }
 618
 619         /**
 620          * Get variables to substitute into tables.sql and the SQL patch files.
 621          *
 622          * @return array
 623          */
 624         public function getSchemaVars() {
 625                 return array(
 626                         'wgDBTableOptions' => $this->getTableOptions(),
 627                         'wgDBname' => $this->getVar( 'wgDBname' ),
 628                         'wgDBuser' => $this->getVar( 'wgDBuser' ),
 629                         'wgDBpassword' => $this->getVar( 'wgDBpassword' ),
 630                 );
 631         }
 632
 633         public function getLocalSettings() {
 634                 $dbmysql5 = wfBoolToStr( $this->getVar( 'wgDBmysql5', true ) );
 635                 $prefix = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBprefix' ) );
 636                 $tblOpts = LocalSettingsGenerator::escapePhpString( $this->getTableOptions() );
 637                 return
 638 "# MySQL specific settings
 639 \$wgDBprefix         = \"{$prefix}\";
 640
 641 # MySQL table options to use during installation or update
 642 \$wgDBTableOptions   = \"{$tblOpts}\";
 643
 644 # Experimental charset support for MySQL 5.0.
 645 \$wgDBmysql5 = {$dbmysql5};";
 646         }
 647 }