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 use Wikimedia\Rdbms\Database;
  25 use Wikimedia\Rdbms\DBQueryError;
  26 use Wikimedia\Rdbms\DBConnectionError;
  27
  28 /**
  29  * Class for setting up the MediaWiki database using MySQL.
  30  *
  31  * @ingroup Deployment
  32  * @since 1.17
  33  */
  34 class MysqlInstaller extends DatabaseInstaller {
  35
  36         protected $globalNames = [
  37                 'wgDBserver',
  38                 'wgDBname',
  39                 'wgDBuser',
  40                 'wgDBpassword',
  41                 'wgDBprefix',
  42                 'wgDBTableOptions',
  43                 'wgDBmysql5',
  44         ];
  45
  46         protected $internalDefaults = [
  47                 '_MysqlEngine' => 'InnoDB',
  48                 '_MysqlCharset' => 'binary',
  49                 '_InstallUser' => 'root',
  50         ];
  51
  52         public $supportedEngines = [ 'InnoDB', 'MyISAM' ];
  53
  54         public static $minimumVersion = '5.5.8';
  55         protected static $notMiniumumVerisonMessage = 'config-mysql-old';
  56
  57         public $webUserPrivs = [
  58                 'DELETE',
  59                 'INSERT',
  60                 'SELECT',
  61                 'UPDATE',
  62                 'CREATE TEMPORARY TABLES',
  63         ];
  64
  65         /**
  66          * @return string
  67          */
  68         public function getName() {
  69                 return 'mysql';
  70         }
  71
  72         /**
  73          * @return bool
  74          */
  75         public function isCompiled() {
  76                 return self::checkExtension( 'mysqli' );
  77         }
  78
  79         /**
  80          * @return string
  81          */
  82         public function getConnectForm() {
  83                 return $this->getTextBox(
  84                         'wgDBserver',
  85                         'config-db-host',
  86                         [],
  87                         $this->parent->getHelpBox( 'config-db-host-help' )
  88                 ) .
  89                         Html::openElement( 'fieldset' ) .
  90                         Html::element( 'legend', [], wfMessage( 'config-db-wiki-settings' )->text() ) .
  91                         $this->getTextBox( 'wgDBname', 'config-db-name', [ 'dir' => 'ltr' ],
  92                                 $this->parent->getHelpBox( 'config-db-name-help' ) ) .
  93                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix', [ 'dir' => 'ltr' ],
  94                                 $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( [ '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 Database
 133                  */
 134                 $conn = $status->value;
 135
 136                 // Check version
 137                 return static::meetsMinimumRequirement( $conn->getServerVersion() );
 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 = $this->escapeLikeInternal( $this->getVar( 'wgDBprefix' ) . 'revision', '\\' );
 179                         $res = $conn->query( "SHOW TABLE STATUS LIKE '$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          * @param string $s
 222          * @param string $escapeChar
 223          * @return string
 224          */
 225         protected function escapeLikeInternal( $s, $escapeChar = '`' ) {
 226                 return str_replace( [ $escapeChar, '%', '_' ],
 227                         [ "{$escapeChar}{$escapeChar}", "{$escapeChar}%", "{$escapeChar}_" ],
 228                         $s );
 229         }
 230
 231         /**
 232          * Get a list of storage engines that are available and supported
 233          *
 234          * @return array
 235          */
 236         public function getEngines() {
 237                 $status = $this->getConnection();
 238
 239                 /**
 240                  * @var $conn Database
 241                  */
 242                 $conn = $status->value;
 243
 244                 $engines = [];
 245                 $res = $conn->query( 'SHOW ENGINES', __METHOD__ );
 246                 foreach ( $res as $row ) {
 247                         if ( $row->Support == 'YES' || $row->Support == 'DEFAULT' ) {
 248                                 $engines[] = $row->Engine;
 249                         }
 250                 }
 251                 $engines = array_intersect( $this->supportedEngines, $engines );
 252
 253                 return $engines;
 254         }
 255
 256         /**
 257          * Get a list of character sets that are available and supported
 258          *
 259          * @return array
 260          */
 261         public function getCharsets() {
 262                 return [ 'binary', 'utf8' ];
 263         }
 264
 265         /**
 266          * Return true if the install user can create accounts
 267          *
 268          * @return bool
 269          */
 270         public function canCreateAccounts() {
 271                 $status = $this->getConnection();
 272                 if ( !$status->isOK() ) {
 273                         return false;
 274                 }
 275                 /** @var Database $conn */
 276                 $conn = $status->value;
 277
 278                 // Get current account name
 279                 $currentName = $conn->selectField( '', 'CURRENT_USER()', '', __METHOD__ );
 280                 $parts = explode( '@', $currentName );
 281                 if ( count( $parts ) != 2 ) {
 282                         return false;
 283                 }
 284                 $quotedUser = $conn->addQuotes( $parts[0] ) .
 285                         '@' . $conn->addQuotes( $parts[1] );
 286
 287                 // The user needs to have INSERT on mysql.* to be able to CREATE USER
 288                 // The grantee will be double-quoted in this query, as required
 289                 $res = $conn->select( 'INFORMATION_SCHEMA.USER_PRIVILEGES', '*',
 290                         [ 'GRANTEE' => $quotedUser ], __METHOD__ );
 291                 $insertMysql = false;
 292                 $grantOptions = array_flip( $this->webUserPrivs );
 293                 foreach ( $res as $row ) {
 294                         if ( $row->PRIVILEGE_TYPE == 'INSERT' ) {
 295                                 $insertMysql = true;
 296                         }
 297                         if ( $row->IS_GRANTABLE ) {
 298                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 299                         }
 300                 }
 301
 302                 // Check for DB-specific privs for mysql.*
 303                 if ( !$insertMysql ) {
 304                         $row = $conn->selectRow( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 305                                 [
 306                                         'GRANTEE' => $quotedUser,
 307                                         'TABLE_SCHEMA' => 'mysql',
 308                                         'PRIVILEGE_TYPE' => 'INSERT',
 309                                 ], __METHOD__ );
 310                         if ( $row ) {
 311                                 $insertMysql = true;
 312                         }
 313                 }
 314
 315                 if ( !$insertMysql ) {
 316                         return false;
 317                 }
 318
 319                 // Check for DB-level grant options
 320                 $res = $conn->select( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 321                         [
 322                                 'GRANTEE' => $quotedUser,
 323                                 'IS_GRANTABLE' => 1,
 324                         ], __METHOD__ );
 325                 foreach ( $res as $row ) {
 326                         $regex = $this->likeToRegex( $row->TABLE_SCHEMA );
 327                         if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 328                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 329                         }
 330                 }
 331                 if ( count( $grantOptions ) ) {
 332                         // Can't grant everything
 333                         return false;
 334                 }
 335
 336                 return true;
 337         }
 338
 339         /**
 340          * Convert a wildcard (as used in LIKE) to a regex
 341          * Slashes are escaped, slash terminators included
 342          * @param string $wildcard
 343          * @return string
 344          */
 345         protected function likeToRegex( $wildcard ) {
 346                 $r = preg_quote( $wildcard, '/' );
 347                 $r = strtr( $r, [
 348                         '%' => '.*',
 349                         '_' => '.'
 350                 ] );
 351                 return "/$r/s";
 352         }
 353
 354         /**
 355          * @return string
 356          */
 357         public function getSettingsForm() {
 358                 if ( $this->canCreateAccounts() ) {
 359                         $noCreateMsg = false;
 360                 } else {
 361                         $noCreateMsg = 'config-db-web-no-create-privs';
 362                 }
 363                 $s = $this->getWebUserBox( $noCreateMsg );
 364
 365                 // Do engine selector
 366                 $engines = $this->getEngines();
 367                 // If the current default engine is not supported, use an engine that is
 368                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 369                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 370                 }
 371
 372                 $s .= Xml::openElement( 'div', [
 373                         'id' => 'dbMyisamWarning'
 374                 ] );
 375                 $myisamWarning = 'config-mysql-myisam-dep';
 376                 if ( count( $engines ) === 1 ) {
 377                         $myisamWarning = 'config-mysql-only-myisam-dep';
 378                 }
 379                 $s .= $this->parent->getWarningBox( wfMessage( $myisamWarning )->text() );
 380                 $s .= Xml::closeElement( 'div' );
 381
 382                 if ( $this->getVar( '_MysqlEngine' ) != 'MyISAM' ) {
 383                         $s .= Xml::openElement( 'script' );
 384                         $s .= '$(\'#dbMyisamWarning\').hide();';
 385                         $s .= Xml::closeElement( 'script' );
 386                 }
 387
 388                 if ( count( $engines ) >= 2 ) {
 389                         // getRadioSet() builds a set of labeled radio buttons.
 390                         // For grep: The following messages are used as the item labels:
 391                         // config-mysql-innodb, config-mysql-myisam
 392                         $s .= $this->getRadioSet( [
 393                                 'var' => '_MysqlEngine',
 394                                 'label' => 'config-mysql-engine',
 395                                 'itemLabelPrefix' => 'config-mysql-',
 396                                 'values' => $engines,
 397                                 'itemAttribs' => [
 398                                         'MyISAM' => [
 399                                                 'class' => 'showHideRadio',
 400                                                 'rel' => 'dbMyisamWarning'
 401                                         ],
 402                                         'InnoDB' => [
 403                                                 'class' => 'hideShowRadio',
 404                                                 'rel' => 'dbMyisamWarning'
 405                                         ]
 406                                 ]
 407                         ] );
 408                         $s .= $this->parent->getHelpBox( 'config-mysql-engine-help' );
 409                 }
 410
 411                 // If the current default charset is not supported, use a charset that is
 412                 $charsets = $this->getCharsets();
 413                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 414                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 415                 }
 416
 417                 return $s;
 418         }
 419
 420         /**
 421          * @return Status
 422          */
 423         public function submitSettingsForm() {
 424                 $this->setVarsFromRequest( [ '_MysqlEngine', '_MysqlCharset' ] );
 425                 $status = $this->submitWebUserBox();
 426                 if ( !$status->isOK() ) {
 427                         return $status;
 428                 }
 429
 430                 // Validate the create checkbox
 431                 $canCreate = $this->canCreateAccounts();
 432                 if ( !$canCreate ) {
 433                         $this->setVar( '_CreateDBAccount', false );
 434                         $create = false;
 435                 } else {
 436                         $create = $this->getVar( '_CreateDBAccount' );
 437                 }
 438
 439                 if ( !$create ) {
 440                         // Test the web account
 441                         try {
 442                                 Database::factory( 'mysql', [
 443                                         'host' => $this->getVar( 'wgDBserver' ),
 444                                         'user' => $this->getVar( 'wgDBuser' ),
 445                                         'password' => $this->getVar( 'wgDBpassword' ),
 446                                         'dbname' => false,
 447                                         'flags' => 0,
 448                                         'tablePrefix' => $this->getVar( 'wgDBprefix' )
 449                                 ] );
 450                         } catch ( DBConnectionError $e ) {
 451                                 return Status::newFatal( 'config-connection-error', $e->getMessage() );
 452                         }
 453                 }
 454
 455                 // Validate engines and charsets
 456                 // This is done pre-submit already so it's just for security
 457                 $engines = $this->getEngines();
 458                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 459                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 460                 }
 461                 $charsets = $this->getCharsets();
 462                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 463                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 464                 }
 465
 466                 return Status::newGood();
 467         }
 468
 469         public function preInstall() {
 470                 # Add our user callback to installSteps, right before the tables are created.
 471                 $callback = [
 472                         'name' => 'user',
 473                         'callback' => [ $this, 'setupUser' ],
 474                 ];
 475                 $this->parent->addInstallStep( $callback, 'tables' );
 476         }
 477
 478         /**
 479          * @return Status
 480          */
 481         public function setupDatabase() {
 482                 $status = $this->getConnection();
 483                 if ( !$status->isOK() ) {
 484                         return $status;
 485                 }
 486                 /** @var Database $conn */
 487                 $conn = $status->value;
 488                 $dbName = $this->getVar( 'wgDBname' );
 489                 if ( !$conn->selectDB( $dbName ) ) {
 490                         $conn->query(
 491                                 "CREATE DATABASE " . $conn->addIdentifierQuotes( $dbName ) . "CHARACTER SET utf8",
 492                                 __METHOD__
 493                         );
 494                         $conn->selectDB( $dbName );
 495                 }
 496                 $this->setupSchemaVars();
 497
 498                 return $status;
 499         }
 500
 501         /**
 502          * @return Status
 503          */
 504         public function setupUser() {
 505                 $dbUser = $this->getVar( 'wgDBuser' );
 506                 if ( $dbUser == $this->getVar( '_InstallUser' ) ) {
 507                         return Status::newGood();
 508                 }
 509                 $status = $this->getConnection();
 510                 if ( !$status->isOK() ) {
 511                         return $status;
 512                 }
 513
 514                 $this->setupSchemaVars();
 515                 $dbName = $this->getVar( 'wgDBname' );
 516                 $this->db->selectDB( $dbName );
 517                 $server = $this->getVar( 'wgDBserver' );
 518                 $password = $this->getVar( 'wgDBpassword' );
 519                 $grantableNames = [];
 520
 521                 if ( $this->getVar( '_CreateDBAccount' ) ) {
 522                         // Before we blindly try to create a user that already has access,
 523                         try { // first attempt to connect to the database
 524                                 Database::factory( 'mysql', [
 525                                         'host' => $server,
 526                                         'user' => $dbUser,
 527                                         'password' => $password,
 528                                         'dbname' => false,
 529                                         'flags' => 0,
 530                                         'tablePrefix' => $this->getVar( 'wgDBprefix' )
 531                                 ] );
 532                                 $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 533                                 $tryToCreate = false;
 534                         } catch ( DBConnectionError $e ) {
 535                                 $tryToCreate = true;
 536                         }
 537                 } else {
 538                         $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 539                         $tryToCreate = false;
 540                 }
 541
 542                 if ( $tryToCreate ) {
 543                         $createHostList = [
 544                                 $server,
 545                                 'localhost',
 546                                 'localhost.localdomain',
 547                                 '%'
 548                         ];
 549
 550                         $createHostList = array_unique( $createHostList );
 551                         $escPass = $this->db->addQuotes( $password );
 552
 553                         foreach ( $createHostList as $host ) {
 554                                 $fullName = $this->buildFullUserName( $dbUser, $host );
 555                                 if ( !$this->userDefinitelyExists( $host, $dbUser ) ) {
 556                                         try {
 557                                                 $this->db->begin( __METHOD__ );
 558                                                 $this->db->query( "CREATE USER $fullName IDENTIFIED BY $escPass", __METHOD__ );
 559                                                 $this->db->commit( __METHOD__ );
 560                                                 $grantableNames[] = $fullName;
 561                                         } catch ( DBQueryError $dqe ) {
 562                                                 if ( $this->db->lastErrno() == 1396 /* ER_CANNOT_USER */ ) {
 563                                                         // User (probably) already exists
 564                                                         $this->db->rollback( __METHOD__ );
 565                                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 566                                                         $grantableNames[] = $fullName;
 567                                                         break;
 568                                                 } else {
 569                                                         // If we couldn't create for some bizzare reason and the
 570                                                         // user probably doesn't exist, skip the grant
 571                                                         $this->db->rollback( __METHOD__ );
 572                                                         $status->warning( 'config-install-user-create-failed', $dbUser, $dqe->getMessage() );
 573                                                 }
 574                                         }
 575                                 } else {
 576                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 577                                         $grantableNames[] = $fullName;
 578                                         break;
 579                                 }
 580                         }
 581                 }
 582
 583                 // Try to grant to all the users we know exist or we were able to create
 584                 $dbAllTables = $this->db->addIdentifierQuotes( $dbName ) . '.*';
 585                 foreach ( $grantableNames as $name ) {
 586                         try {
 587                                 $this->db->begin( __METHOD__ );
 588                                 $this->db->query( "GRANT ALL PRIVILEGES ON $dbAllTables TO $name", __METHOD__ );
 589                                 $this->db->commit( __METHOD__ );
 590                         } catch ( DBQueryError $dqe ) {
 591                                 $this->db->rollback( __METHOD__ );
 592                                 $status->fatal( 'config-install-user-grant-failed', $dbUser, $dqe->getMessage() );
 593                         }
 594                 }
 595
 596                 return $status;
 597         }
 598
 599         /**
 600          * Return a formal 'User'@'Host' username for use in queries
 601          * @param string $name Username, quotes will be added
 602          * @param string $host Hostname, quotes will be added
 603          * @return string
 604          */
 605         private function buildFullUserName( $name, $host ) {
 606                 return $this->db->addQuotes( $name ) . '@' . $this->db->addQuotes( $host );
 607         }
 608
 609         /**
 610          * Try to see if the user account exists. Our "superuser" may not have
 611          * access to mysql.user, so false means "no" or "maybe"
 612          * @param string $host Hostname to check
 613          * @param string $user Username to check
 614          * @return bool
 615          */
 616         private function userDefinitelyExists( $host, $user ) {
 617                 try {
 618                         $res = $this->db->selectRow( 'mysql.user', [ 'Host', 'User' ],
 619                                 [ 'Host' => $host, 'User' => $user ], __METHOD__ );
 620
 621                         return (bool)$res;
 622                 } catch ( DBQueryError $dqe ) {
 623                         return false;
 624                 }
 625         }
 626
 627         /**
 628          * Return any table options to be applied to all tables that don't
 629          * override them.
 630          *
 631          * @return string
 632          */
 633         protected function getTableOptions() {
 634                 $options = [];
 635                 if ( $this->getVar( '_MysqlEngine' ) !== null ) {
 636                         $options[] = "ENGINE=" . $this->getVar( '_MysqlEngine' );
 637                 }
 638                 if ( $this->getVar( '_MysqlCharset' ) !== null ) {
 639                         $options[] = 'DEFAULT CHARSET=' . $this->getVar( '_MysqlCharset' );
 640                 }
 641
 642                 return implode( ', ', $options );
 643         }
 644
 645         /**
 646          * Get variables to substitute into tables.sql and the SQL patch files.
 647          *
 648          * @return array
 649          */
 650         public function getSchemaVars() {
 651                 return [
 652                         'wgDBTableOptions' => $this->getTableOptions(),
 653                         'wgDBname' => $this->getVar( 'wgDBname' ),
 654                         'wgDBuser' => $this->getVar( 'wgDBuser' ),
 655                         'wgDBpassword' => $this->getVar( 'wgDBpassword' ),
 656                 ];
 657         }
 658
 659         public function getLocalSettings() {
 660                 $dbmysql5 = wfBoolToStr( $this->getVar( 'wgDBmysql5', true ) );
 661                 $prefix = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBprefix' ) );
 662                 $tblOpts = LocalSettingsGenerator::escapePhpString( $this->getTableOptions() );
 663
 664                 return "# MySQL specific settings
 665 \$wgDBprefix = \"{$prefix}\";
 666
 667 # MySQL table options to use during installation or update
 668 \$wgDBTableOptions = \"{$tblOpts}\";
 669
 670 # Experimental charset support for MySQL 5.0.
 671 \$wgDBmysql5 = {$dbmysql5};";
 672         }
 673 }