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