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 = [
  33                 'wgDBserver',
  34                 'wgDBname',
  35                 'wgDBuser',
  36                 'wgDBpassword',
  37                 'wgDBprefix',
  38                 'wgDBTableOptions',
  39                 'wgDBmysql5',
  40         ];
  41
  42         protected $internalDefaults = [
  43                 '_MysqlEngine' => 'InnoDB',
  44                 '_MysqlCharset' => 'binary',
  45                 '_InstallUser' => 'root',
  46         ];
  47
  48         public $supportedEngines = [ 'InnoDB', 'MyISAM' ];
  49
  50         public $minimumVersion = '5.0.3';
  51
  52         public $webUserPrivs = [
  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         /**
  68          * @return bool
  69          */
  70         public function isCompiled() {
  71                 return self::checkExtension( 'mysql' ) || self::checkExtension( 'mysqli' );
  72         }
  73
  74         /**
  75          * @return string
  76          */
  77         public function getConnectForm() {
  78                 return $this->getTextBox(
  79                         'wgDBserver',
  80                         'config-db-host',
  81                         [],
  82                         $this->parent->getHelpBox( 'config-db-host-help' )
  83                 ) .
  84                         Html::openElement( 'fieldset' ) .
  85                         Html::element( 'legend', [], wfMessage( 'config-db-wiki-settings' )->text() ) .
  86                         $this->getTextBox( 'wgDBname', 'config-db-name', [ 'dir' => 'ltr' ],
  87                                 $this->parent->getHelpBox( 'config-db-name-help' ) ) .
  88                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix', [ 'dir' => 'ltr' ],
  89                                 $this->parent->getHelpBox( 'config-db-prefix-help' ) ) .
  90                         Html::closeElement( 'fieldset' ) .
  91                         $this->getInstallUserBox();
  92         }
  93
  94         public function submitConnectForm() {
  95                 // Get variables from the request.
  96                 $newValues = $this->setVarsFromRequest( [ 'wgDBserver', 'wgDBname', 'wgDBprefix' ] );
  97
  98                 // Validate them.
  99                 $status = Status::newGood();
 100                 if ( !strlen( $newValues['wgDBserver'] ) ) {
 101                         $status->fatal( 'config-missing-db-host' );
 102                 }
 103                 if ( !strlen( $newValues['wgDBname'] ) ) {
 104                         $status->fatal( 'config-missing-db-name' );
 105                 } elseif ( !preg_match( '/^[a-z0-9+_-]+$/i', $newValues['wgDBname'] ) ) {
 106                         $status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
 107                 }
 108                 if ( !preg_match( '/^[a-z0-9_-]*$/i', $newValues['wgDBprefix'] ) ) {
 109                         $status->fatal( 'config-invalid-db-prefix', $newValues['wgDBprefix'] );
 110                 }
 111                 if ( !$status->isOK() ) {
 112                         return $status;
 113                 }
 114
 115                 // Submit user box
 116                 $status = $this->submitInstallUserBox();
 117                 if ( !$status->isOK() ) {
 118                         return $status;
 119                 }
 120
 121                 // Try to connect
 122                 $status = $this->getConnection();
 123                 if ( !$status->isOK() ) {
 124                         return $status;
 125                 }
 126                 /**
 127                  * @var $conn Database
 128                  */
 129                 $conn = $status->value;
 130
 131                 // Check version
 132                 $version = $conn->getServerVersion();
 133                 if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
 134                         return Status::newFatal( 'config-mysql-old', $this->minimumVersion, $version );
 135                 }
 136
 137                 return $status;
 138         }
 139
 140         /**
 141          * @return Status
 142          */
 143         public function openConnection() {
 144                 $status = Status::newGood();
 145                 try {
 146                         $db = Database::factory( 'mysql', [
 147                                 'host' => $this->getVar( 'wgDBserver' ),
 148                                 'user' => $this->getVar( '_InstallUser' ),
 149                                 'password' => $this->getVar( '_InstallPassword' ),
 150                                 'dbname' => false,
 151                                 'flags' => 0,
 152                                 'tablePrefix' => $this->getVar( 'wgDBprefix' ) ] );
 153                         $status->value = $db;
 154                 } catch ( DBConnectionError $e ) {
 155                         $status->fatal( 'config-connection-error', $e->getMessage() );
 156                 }
 157
 158                 return $status;
 159         }
 160
 161         public function preUpgrade() {
 162                 global $wgDBuser, $wgDBpassword;
 163
 164                 $status = $this->getConnection();
 165                 if ( !$status->isOK() ) {
 166                         $this->parent->showStatusError( $status );
 167
 168                         return;
 169                 }
 170                 /**
 171                  * @var $conn Database
 172                  */
 173                 $conn = $status->value;
 174                 $conn->selectDB( $this->getVar( 'wgDBname' ) );
 175
 176                 # Determine existing default character set
 177                 if ( $conn->tableExists( "revision", __METHOD__ ) ) {
 178                         $revision = $conn->buildLike( $this->getVar( 'wgDBprefix' ) . 'revision' );
 179                         $res = $conn->query( "SHOW TABLE STATUS $revision", __METHOD__ );
 180                         $row = $conn->fetchObject( $res );
 181                         if ( !$row ) {
 182                                 $this->parent->showMessage( 'config-show-table-status' );
 183                                 $existingSchema = false;
 184                                 $existingEngine = false;
 185                         } else {
 186                                 if ( preg_match( '/^latin1/', $row->Collation ) ) {
 187                                         $existingSchema = 'latin1';
 188                                 } elseif ( preg_match( '/^utf8/', $row->Collation ) ) {
 189                                         $existingSchema = 'utf8';
 190                                 } elseif ( preg_match( '/^binary/', $row->Collation ) ) {
 191                                         $existingSchema = 'binary';
 192                                 } else {
 193                                         $existingSchema = false;
 194                                         $this->parent->showMessage( 'config-unknown-collation' );
 195                                 }
 196                                 if ( isset( $row->Engine ) ) {
 197                                         $existingEngine = $row->Engine;
 198                                 } else {
 199                                         $existingEngine = $row->Type;
 200                                 }
 201                         }
 202                 } else {
 203                         $existingSchema = false;
 204                         $existingEngine = false;
 205                 }
 206
 207                 if ( $existingSchema && $existingSchema != $this->getVar( '_MysqlCharset' ) ) {
 208                         $this->setVar( '_MysqlCharset', $existingSchema );
 209                 }
 210                 if ( $existingEngine && $existingEngine != $this->getVar( '_MysqlEngine' ) ) {
 211                         $this->setVar( '_MysqlEngine', $existingEngine );
 212                 }
 213
 214                 # Normal user and password are selected after this step, so for now
 215                 # just copy these two
 216                 $wgDBuser = $this->getVar( '_InstallUser' );
 217                 $wgDBpassword = $this->getVar( '_InstallPassword' );
 218         }
 219
 220         /**
 221          * Get a list of storage engines that are available and supported
 222          *
 223          * @return array
 224          */
 225         public function getEngines() {
 226                 $status = $this->getConnection();
 227
 228                 /**
 229                  * @var $conn Database
 230                  */
 231                 $conn = $status->value;
 232
 233                 $engines = [];
 234                 $res = $conn->query( 'SHOW ENGINES', __METHOD__ );
 235                 foreach ( $res as $row ) {
 236                         if ( $row->Support == 'YES' || $row->Support == 'DEFAULT' ) {
 237                                 $engines[] = $row->Engine;
 238                         }
 239                 }
 240                 $engines = array_intersect( $this->supportedEngines, $engines );
 241
 242                 return $engines;
 243         }
 244
 245         /**
 246          * Get a list of character sets that are available and supported
 247          *
 248          * @return array
 249          */
 250         public function getCharsets() {
 251                 return [ 'binary', 'utf8' ];
 252         }
 253
 254         /**
 255          * Return true if the install user can create accounts
 256          *
 257          * @return bool
 258          */
 259         public function canCreateAccounts() {
 260                 $status = $this->getConnection();
 261                 if ( !$status->isOK() ) {
 262                         return false;
 263                 }
 264                 /** @var $conn Database */
 265                 $conn = $status->value;
 266
 267                 // Get current account name
 268                 $currentName = $conn->selectField( '', 'CURRENT_USER()', '', __METHOD__ );
 269                 $parts = explode( '@', $currentName );
 270                 if ( count( $parts ) != 2 ) {
 271                         return false;
 272                 }
 273                 $quotedUser = $conn->addQuotes( $parts[0] ) .
 274                         '@' . $conn->addQuotes( $parts[1] );
 275
 276                 // The user needs to have INSERT on mysql.* to be able to CREATE USER
 277                 // The grantee will be double-quoted in this query, as required
 278                 $res = $conn->select( 'INFORMATION_SCHEMA.USER_PRIVILEGES', '*',
 279                         [ 'GRANTEE' => $quotedUser ], __METHOD__ );
 280                 $insertMysql = false;
 281                 $grantOptions = array_flip( $this->webUserPrivs );
 282                 foreach ( $res as $row ) {
 283                         if ( $row->PRIVILEGE_TYPE == 'INSERT' ) {
 284                                 $insertMysql = true;
 285                         }
 286                         if ( $row->IS_GRANTABLE ) {
 287                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 288                         }
 289                 }
 290
 291                 // Check for DB-specific privs for mysql.*
 292                 if ( !$insertMysql ) {
 293                         $row = $conn->selectRow( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 294                                 [
 295                                         'GRANTEE' => $quotedUser,
 296                                         'TABLE_SCHEMA' => 'mysql',
 297                                         'PRIVILEGE_TYPE' => 'INSERT',
 298                                 ], __METHOD__ );
 299                         if ( $row ) {
 300                                 $insertMysql = true;
 301                         }
 302                 }
 303
 304                 if ( !$insertMysql ) {
 305                         return false;
 306                 }
 307
 308                 // Check for DB-level grant options
 309                 $res = $conn->select( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 310                         [
 311                                 'GRANTEE' => $quotedUser,
 312                                 'IS_GRANTABLE' => 1,
 313                         ], __METHOD__ );
 314                 foreach ( $res as $row ) {
 315                         $regex = $this->likeToRegex( $row->TABLE_SCHEMA );
 316                         if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 317                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 318                         }
 319                 }
 320                 if ( count( $grantOptions ) ) {
 321                         // Can't grant everything
 322                         return false;
 323                 }
 324
 325                 return true;
 326         }
 327
 328         /**
 329          * Convert a wildcard (as used in LIKE) to a regex
 330          * Slashes are escaped, slash terminators included
 331          */
 332         protected function likeToRegex( $wildcard ) {
 333                 $r = preg_quote( $wildcard, '/' );
 334                 $r = strtr( $r, [
 335                         '%' => '.*',
 336                         '_' => '.'
 337                 ] );
 338                 return "/$r/s";
 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', [
 360                         'id' => 'dbMyisamWarning'
 361                 ] );
 362                 $myisamWarning = 'config-mysql-myisam-dep';
 363                 if ( count( $engines ) === 1 ) {
 364                         $myisamWarning = 'config-mysql-only-myisam-dep';
 365                 }
 366                 $s .= $this->parent->getWarningBox( wfMessage( $myisamWarning )->text() );
 367                 $s .= Xml::closeElement( 'div' );
 368
 369                 if ( $this->getVar( '_MysqlEngine' ) != 'MyISAM' ) {
 370                         $s .= Xml::openElement( 'script' );
 371                         $s .= '$(\'#dbMyisamWarning\').hide();';
 372                         $s .= Xml::closeElement( 'script' );
 373                 }
 374
 375                 if ( count( $engines ) >= 2 ) {
 376                         // getRadioSet() builds a set of labeled radio buttons.
 377                         // For grep: The following messages are used as the item labels:
 378                         // config-mysql-innodb, config-mysql-myisam
 379                         $s .= $this->getRadioSet( [
 380                                 'var' => '_MysqlEngine',
 381                                 'label' => 'config-mysql-engine',
 382                                 'itemLabelPrefix' => 'config-mysql-',
 383                                 'values' => $engines,
 384                                 'itemAttribs' => [
 385                                         'MyISAM' => [
 386                                                 'class' => 'showHideRadio',
 387                                                 'rel' => 'dbMyisamWarning'
 388                                         ],
 389                                         'InnoDB' => [
 390                                                 'class' => 'hideShowRadio',
 391                                                 'rel' => 'dbMyisamWarning'
 392                                         ]
 393                                 ]
 394                         ] );
 395                         $s .= $this->parent->getHelpBox( 'config-mysql-engine-help' );
 396                 }
 397
 398                 // If the current default charset is not supported, use a charset that is
 399                 $charsets = $this->getCharsets();
 400                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 401                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 402                 }
 403
 404                 // Do charset selector
 405                 if ( count( $charsets ) >= 2 ) {
 406                         // getRadioSet() builds a set of labeled radio buttons.
 407                         // For grep: The following messages are used as the item labels:
 408                         // config-mysql-binary, config-mysql-utf8
 409                         $s .= $this->getRadioSet( [
 410                                 'var' => '_MysqlCharset',
 411                                 'label' => 'config-mysql-charset',
 412                                 'itemLabelPrefix' => 'config-mysql-',
 413                                 'values' => $charsets
 414                         ] );
 415                         $s .= $this->parent->getHelpBox( 'config-mysql-charset-help' );
 416                 }
 417
 418                 return $s;
 419         }
 420
 421         /**
 422          * @return Status
 423          */
 424         public function submitSettingsForm() {
 425                 $this->setVarsFromRequest( [ '_MysqlEngine', '_MysqlCharset' ] );
 426                 $status = $this->submitWebUserBox();
 427                 if ( !$status->isOK() ) {
 428                         return $status;
 429                 }
 430
 431                 // Validate the create checkbox
 432                 $canCreate = $this->canCreateAccounts();
 433                 if ( !$canCreate ) {
 434                         $this->setVar( '_CreateDBAccount', false );
 435                         $create = false;
 436                 } else {
 437                         $create = $this->getVar( '_CreateDBAccount' );
 438                 }
 439
 440                 if ( !$create ) {
 441                         // Test the web account
 442                         try {
 443                                 Database::factory( 'mysql', [
 444                                         'host' => $this->getVar( 'wgDBserver' ),
 445                                         'user' => $this->getVar( 'wgDBuser' ),
 446                                         'password' => $this->getVar( 'wgDBpassword' ),
 447                                         'dbname' => false,
 448                                         'flags' => 0,
 449                                         'tablePrefix' => $this->getVar( 'wgDBprefix' )
 450                                 ] );
 451                         } catch ( DBConnectionError $e ) {
 452                                 return Status::newFatal( 'config-connection-error', $e->getMessage() );
 453                         }
 454                 }
 455
 456                 // Validate engines and charsets
 457                 // This is done pre-submit already so it's just for security
 458                 $engines = $this->getEngines();
 459                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 460                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 461                 }
 462                 $charsets = $this->getCharsets();
 463                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 464                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 465                 }
 466
 467                 return Status::newGood();
 468         }
 469
 470         public function preInstall() {
 471                 # Add our user callback to installSteps, right before the tables are created.
 472                 $callback = [
 473                         'name' => 'user',
 474                         'callback' => [ $this, 'setupUser' ],
 475                 ];
 476                 $this->parent->addInstallStep( $callback, 'tables' );
 477         }
 478
 479         /**
 480          * @return Status
 481          */
 482         public function setupDatabase() {
 483                 $status = $this->getConnection();
 484                 if ( !$status->isOK() ) {
 485                         return $status;
 486                 }
 487                 /** @var Database $conn */
 488                 $conn = $status->value;
 489                 $dbName = $this->getVar( 'wgDBname' );
 490                 if ( !$conn->selectDB( $dbName ) ) {
 491                         $conn->query(
 492                                 "CREATE DATABASE " . $conn->addIdentifierQuotes( $dbName ) . "CHARACTER SET utf8",
 493                                 __METHOD__
 494                         );
 495                         $conn->selectDB( $dbName );
 496                 }
 497                 $this->setupSchemaVars();
 498
 499                 return $status;
 500         }
 501
 502         /**
 503          * @return Status
 504          */
 505         public function setupUser() {
 506                 $dbUser = $this->getVar( 'wgDBuser' );
 507                 if ( $dbUser == $this->getVar( '_InstallUser' ) ) {
 508                         return Status::newGood();
 509                 }
 510                 $status = $this->getConnection();
 511                 if ( !$status->isOK() ) {
 512                         return $status;
 513                 }
 514
 515                 $this->setupSchemaVars();
 516                 $dbName = $this->getVar( 'wgDBname' );
 517                 $this->db->selectDB( $dbName );
 518                 $server = $this->getVar( 'wgDBserver' );
 519                 $password = $this->getVar( 'wgDBpassword' );
 520                 $grantableNames = [];
 521
 522                 if ( $this->getVar( '_CreateDBAccount' ) ) {
 523                         // Before we blindly try to create a user that already has access,
 524                         try { // first attempt to connect to the database
 525                                 Database::factory( 'mysql', [
 526                                         'host' => $server,
 527                                         'user' => $dbUser,
 528                                         'password' => $password,
 529                                         'dbname' => false,
 530                                         'flags' => 0,
 531                                         'tablePrefix' => $this->getVar( 'wgDBprefix' )
 532                                 ] );
 533                                 $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 534                                 $tryToCreate = false;
 535                         } catch ( DBConnectionError $e ) {
 536                                 $tryToCreate = true;
 537                         }
 538                 } else {
 539                         $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 540                         $tryToCreate = false;
 541                 }
 542
 543                 if ( $tryToCreate ) {
 544                         $createHostList = [
 545                                 $server,
 546                                 'localhost',
 547                                 'localhost.localdomain',
 548                                 '%'
 549                         ];
 550
 551                         $createHostList = array_unique( $createHostList );
 552                         $escPass = $this->db->addQuotes( $password );
 553
 554                         foreach ( $createHostList as $host ) {
 555                                 $fullName = $this->buildFullUserName( $dbUser, $host );
 556                                 if ( !$this->userDefinitelyExists( $host, $dbUser ) ) {
 557                                         try {
 558                                                 $this->db->begin( __METHOD__ );
 559                                                 $this->db->query( "CREATE USER $fullName IDENTIFIED BY $escPass", __METHOD__ );
 560                                                 $this->db->commit( __METHOD__ );
 561                                                 $grantableNames[] = $fullName;
 562                                         } catch ( DBQueryError $dqe ) {
 563                                                 if ( $this->db->lastErrno() == 1396 /* ER_CANNOT_USER */ ) {
 564                                                         // User (probably) already exists
 565                                                         $this->db->rollback( __METHOD__ );
 566                                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 567                                                         $grantableNames[] = $fullName;
 568                                                         break;
 569                                                 } else {
 570                                                         // If we couldn't create for some bizzare reason and the
 571                                                         // user probably doesn't exist, skip the grant
 572                                                         $this->db->rollback( __METHOD__ );
 573                                                         $status->warning( 'config-install-user-create-failed', $dbUser, $dqe->getText() );
 574                                                 }
 575                                         }
 576                                 } else {
 577                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 578                                         $grantableNames[] = $fullName;
 579                                         break;
 580                                 }
 581                         }
 582                 }
 583
 584                 // Try to grant to all the users we know exist or we were able to create
 585                 $dbAllTables = $this->db->addIdentifierQuotes( $dbName ) . '.*';
 586                 foreach ( $grantableNames as $name ) {
 587                         try {
 588                                 $this->db->begin( __METHOD__ );
 589                                 $this->db->query( "GRANT ALL PRIVILEGES ON $dbAllTables TO $name", __METHOD__ );
 590                                 $this->db->commit( __METHOD__ );
 591                         } catch ( DBQueryError $dqe ) {
 592                                 $this->db->rollback( __METHOD__ );
 593                                 $status->fatal( 'config-install-user-grant-failed', $dbUser, $dqe->getText() );
 594                         }
 595                 }
 596
 597                 return $status;
 598         }
 599
 600         /**
 601          * Return a formal 'User'@'Host' username for use in queries
 602          * @param string $name Username, quotes will be added
 603          * @param string $host Hostname, quotes will be added
 604          * @return string
 605          */
 606         private function buildFullUserName( $name, $host ) {
 607                 return $this->db->addQuotes( $name ) . '@' . $this->db->addQuotes( $host );
 608         }
 609
 610         /**
 611          * Try to see if the user account exists. Our "superuser" may not have
 612          * access to mysql.user, so false means "no" or "maybe"
 613          * @param string $host Hostname to check
 614          * @param string $user Username to check
 615          * @return bool
 616          */
 617         private function userDefinitelyExists( $host, $user ) {
 618                 try {
 619                         $res = $this->db->selectRow( 'mysql.user', [ 'Host', 'User' ],
 620                                 [ 'Host' => $host, 'User' => $user ], __METHOD__ );
 621
 622                         return (bool)$res;
 623                 } catch ( DBQueryError $dqe ) {
 624                         return false;
 625                 }
 626         }
 627
 628         /**
 629          * Return any table options to be applied to all tables that don't
 630          * override them.
 631          *
 632          * @return string
 633          */
 634         protected function getTableOptions() {
 635                 $options = [];
 636                 if ( $this->getVar( '_MysqlEngine' ) !== null ) {
 637                         $options[] = "ENGINE=" . $this->getVar( '_MysqlEngine' );
 638                 }
 639                 if ( $this->getVar( '_MysqlCharset' ) !== null ) {
 640                         $options[] = 'DEFAULT CHARSET=' . $this->getVar( '_MysqlCharset' );
 641                 }
 642
 643                 return implode( ', ', $options );
 644         }
 645
 646         /**
 647          * Get variables to substitute into tables.sql and the SQL patch files.
 648          *
 649          * @return array
 650          */
 651         public function getSchemaVars() {
 652                 return [
 653                         'wgDBTableOptions' => $this->getTableOptions(),
 654                         'wgDBname' => $this->getVar( 'wgDBname' ),
 655                         'wgDBuser' => $this->getVar( 'wgDBuser' ),
 656                         'wgDBpassword' => $this->getVar( 'wgDBpassword' ),
 657                 ];
 658         }
 659
 660         public function getLocalSettings() {
 661                 $dbmysql5 = wfBoolToStr( $this->getVar( 'wgDBmysql5', true ) );
 662                 $prefix = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBprefix' ) );
 663                 $tblOpts = LocalSettingsGenerator::escapePhpString( $this->getTableOptions() );
 664
 665                 return "# MySQL specific settings
 666 \$wgDBprefix = \"{$prefix}\";
 667
 668 # MySQL table options to use during installation or update
 669 \$wgDBTableOptions = \"{$tblOpts}\";
 670
 671 # Experimental charset support for MySQL 5.0.
 672 \$wgDBmysql5 = {$dbmysql5};";
 673         }
 674 }