Setup.php

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<?php
use MediaWiki\MediaWikiServices;
use Wikimedia\Rdbms\LBFactory;
use Wikimedia\Rdbms\ChronologyProtector;

if ( !defined( 'MEDIAWIKI' ) ) {
    exit( 1 );
}

// Check to see if we are at the file scope
$wgScopeTest = 'MediaWiki Setup.php scope test';
if ( !isset( $GLOBALS['wgScopeTest'] ) || $GLOBALS['wgScopeTest'] !== $wgScopeTest ) {
    echo "Error, Setup.php must be included from the file scope.\n";
    die( 1 );
}
unset( $wgScopeTest );

// Sanity check (T5782, T122807)
if ( ini_get( 'mbstring.func_overload' ) ) {
    die( 'MediaWiki does not support installations where mbstring.func_overload is non-zero.' );
}

// Define MW_ENTRY_POINT if it's not already, so that config code can check the
// value without using defined()
if ( !defined( 'MW_ENTRY_POINT' ) ) {
    define( 'MW_ENTRY_POINT', 'unknown' );
}

// Start the autoloader, so that extensions can derive classes from core files
require_once "$IP/includes/AutoLoader.php";

// Load global constants
require_once "$IP/includes/Defines.php";

// Load default settings
require_once "$IP/includes/DefaultSettings.php";

// Load global functions
require_once "$IP/includes/GlobalFunctions.php";

// Load composer's autoloader if present
if ( is_readable( "$IP/vendor/autoload.php" ) ) {
    require_once "$IP/vendor/autoload.php";
} elseif ( file_exists( "$IP/vendor/autoload.php" ) ) {
    die( "$IP/vendor/autoload.php exists but is not readable" );
}

// Assert that composer dependencies were successfully loaded
// Purposely no leading \ due to it breaking HHVM RepoAuthorative mode
// PHP works fine with both versions
// See https://github.com/facebook/hhvm/issues/5833
if ( !interface_exists( 'Psr\Log\LoggerInterface' ) ) {
    $message = (
        'MediaWiki requires the <a href="https://github.com/php-fig/log">PSR-3 logging ' .
        "library</a> to be present. This library is not embedded directly in MediaWiki's " .
        "git repository and must be installed separately by the end user.\n\n" .
        'Please see <a href="https://www.mediawiki.org/wiki/Download_from_Git' .
        '#Fetch_external_libraries">mediawiki.org</a> for help on installing ' .
        'the required components.'
    );
    echo $message;
    trigger_error( $message, E_USER_ERROR );
    die( 1 );
}

// Install a header callback
MediaWiki\HeaderCallback::register();

// Set the encoding used by PHP for reading HTTP input, and writing output.
// This is also the default for mbstring functions.
mb_internal_encoding( 'UTF-8' );

if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
    call_user_func( MW_CONFIG_CALLBACK );
} else {
    if ( !defined( 'MW_CONFIG_FILE' ) ) {
        define( 'MW_CONFIG_FILE', "$IP/LocalSettings.php" );
    }
    require_once MW_CONFIG_FILE;
}

if ( defined( 'MW_SETUP_CALLBACK' ) ) {
    call_user_func( MW_SETUP_CALLBACK );
}

// Load queued extensions
ExtensionRegistry::getInstance()->loadFromQueue();
// Don't let any other extensions load
ExtensionRegistry::getInstance()->finish();

// Set the configured locale on all requests for consisteny
putenv( "LC_ALL=$wgShellLocale" );
setlocale( LC_ALL, $wgShellLocale );

// Set various default paths sensibly...
if ( $wgScript === false ) {
    $wgScript = "$wgScriptPath/index.php";
}
if ( $wgLoadScript === false ) {
    $wgLoadScript = "$wgScriptPath/load.php";
}
if ( $wgRestPath === false ) {
    $wgRestPath = "$wgScriptPath/rest.php";
}

if ( $wgArticlePath === false ) {
    if ( $wgUsePathInfo ) {
        $wgArticlePath = "$wgScript/$1";
    } else {
        $wgArticlePath = "$wgScript?title=$1";
    }
}

if ( $wgResourceBasePath === null ) {
    $wgResourceBasePath = $wgScriptPath;
}
if ( $wgStylePath === false ) {
    $wgStylePath = "$wgResourceBasePath/skins";
}
if ( $wgLocalStylePath === false ) {
    // Avoid wgResourceBasePath here since that may point to a different domain (e.g. CDN)
    $wgLocalStylePath = "$wgScriptPath/skins";
}
if ( $wgExtensionAssetsPath === false ) {
    $wgExtensionAssetsPath = "$wgResourceBasePath/extensions";
}

if ( $wgLogo === false ) {
    $wgLogo = "$wgResourceBasePath/resources/assets/wiki.png";
}

if ( $wgUploadPath === false ) {
    $wgUploadPath = "$wgScriptPath/images";
}
if ( $wgUploadDirectory === false ) {
    $wgUploadDirectory = "$IP/images";
}
if ( $wgReadOnlyFile === false ) {
    $wgReadOnlyFile = "{$wgUploadDirectory}/lock_yBgMBwiR";
}
if ( $wgFileCacheDirectory === false ) {
    $wgFileCacheDirectory = "{$wgUploadDirectory}/cache";
}
if ( $wgDeletedDirectory === false ) {
    $wgDeletedDirectory = "{$wgUploadDirectory}/deleted";
}

if ( $wgGitInfoCacheDirectory === false && $wgCacheDirectory !== false ) {
    $wgGitInfoCacheDirectory = "{$wgCacheDirectory}/gitinfo";
}

// Fix path to icon images after they were moved in 1.24
if ( $wgRightsIcon ) {
    $wgRightsIcon = str_replace(
        "{$wgStylePath}/common/images/",
        "{$wgResourceBasePath}/resources/assets/licenses/",
        $wgRightsIcon
    );
}

if ( isset( $wgFooterIcons['copyright']['copyright'] )
    && $wgFooterIcons['copyright']['copyright'] === []
) {
    if ( $wgRightsIcon || $wgRightsText ) {
        $wgFooterIcons['copyright']['copyright'] = [
            'url' => $wgRightsUrl,
            'src' => $wgRightsIcon,
            'alt' => $wgRightsText,
        ];
    }
}

if ( isset( $wgFooterIcons['poweredby'] )
    && isset( $wgFooterIcons['poweredby']['mediawiki'] )
    && $wgFooterIcons['poweredby']['mediawiki']['src'] === null
) {
    $wgFooterIcons['poweredby']['mediawiki']['src'] =
        "$wgResourceBasePath/resources/assets/poweredby_mediawiki_88x31.png";
    $wgFooterIcons['poweredby']['mediawiki']['srcset'] =
        "$wgResourceBasePath/resources/assets/poweredby_mediawiki_132x47.png 1.5x, " .
        "$wgResourceBasePath/resources/assets/poweredby_mediawiki_176x62.png 2x";
}

$wgNamespaceProtection[NS_MEDIAWIKI] = 'editinterface';

$wgNamespaceAliases['Image'] = NS_FILE;
$wgNamespaceAliases['Image_talk'] = NS_FILE_TALK;

$wgLockManagers[] = [
    'name' => 'fsLockManager',
    'class' => FSLockManager::class,
    'lockDirectory' => "{$wgUploadDirectory}/lockdir",
];
$wgLockManagers[] = [
    'name' => 'nullLockManager',
    'class' => NullLockManager::class,
];

$wgGalleryOptions += [
    'imagesPerRow' => 0,
    'imageWidth' => 120,
    'imageHeight' => 120,
    'captionLength' => true,
    'showBytes' => true,
    'showDimensions' => true,
    'mode' => 'traditional',
];

if ( !$wgLocalFileRepo ) {
    $wgLocalFileRepo = [
        'class' => LocalRepo::class,
        'name' => 'local',
        'directory' => $wgUploadDirectory,
        'scriptDirUrl' => $wgScriptPath,
        'url' => $wgUploadBaseUrl ? $wgUploadBaseUrl . $wgUploadPath : $wgUploadPath,
        'hashLevels' => $wgHashedUploadDirectory ? 2 : 0,
        'thumbScriptUrl' => $wgThumbnailScriptPath,
        'transformVia404' => !$wgGenerateThumbnailOnParse,
        'deletedDir' => $wgDeletedDirectory,
        'deletedHashLevels' => $wgHashedUploadDirectory ? 3 : 0
    ];
}

if ( !isset( $wgLocalFileRepo['backend'] ) ) {
    // Create a default FileBackend name.
    // FileBackendGroup will register a default, if absent from $wgFileBackends.
    $wgLocalFileRepo['backend'] = $wgLocalFileRepo['name'] . '-backend';
}

if ( $wgUseSharedUploads ) {
    if ( $wgSharedUploadDBname ) {
        $wgForeignFileRepos[] = [
            'class' => ForeignDBRepo::class,
            'name' => 'shared',
            'directory' => $wgSharedUploadDirectory,
            'url' => $wgSharedUploadPath,
            'hashLevels' => $wgHashedSharedUploadDirectory ? 2 : 0,
            'thumbScriptUrl' => $wgSharedThumbnailScriptPath,
            'transformVia404' => !$wgGenerateThumbnailOnParse,
            'dbType' => $wgDBtype,
            'dbServer' => $wgDBserver,
            'dbUser' => $wgDBuser,
            'dbPassword' => $wgDBpassword,
            'dbName' => $wgSharedUploadDBname,
            'dbFlags' => ( $wgDebugDumpSql ? DBO_DEBUG : 0 ) | DBO_DEFAULT,
            'tablePrefix' => $wgSharedUploadDBprefix,
            'hasSharedCache' => $wgCacheSharedUploads,
            'descBaseUrl' => $wgRepositoryBaseUrl,
            'fetchDescription' => $wgFetchCommonsDescriptions,
        ];
    } else {
        $wgForeignFileRepos[] = [
            'class' => FileRepo::class,
            'name' => 'shared',
            'directory' => $wgSharedUploadDirectory,
            'url' => $wgSharedUploadPath,
            'hashLevels' => $wgHashedSharedUploadDirectory ? 2 : 0,
            'thumbScriptUrl' => $wgSharedThumbnailScriptPath,
            'transformVia404' => !$wgGenerateThumbnailOnParse,
            'descBaseUrl' => $wgRepositoryBaseUrl,
            'fetchDescription' => $wgFetchCommonsDescriptions,
        ];
    }
}
if ( $wgUseInstantCommons ) {
    $wgForeignFileRepos[] = [
        'class' => ForeignAPIRepo::class,
        'name' => 'wikimediacommons',
        'apibase' => 'https://commons.wikimedia.org/w/api.php',
        'url' => 'https://upload.wikimedia.org/wikipedia/commons',
        'thumbUrl' => 'https://upload.wikimedia.org/wikipedia/commons/thumb',
        'hashLevels' => 2,
        'transformVia404' => true,
        'fetchDescription' => true,
        'descriptionCacheExpiry' => 43200,
        'apiThumbCacheExpiry' => 0,
    ];
}
foreach ( $wgForeignFileRepos as &$repo ) {
    if ( !isset( $repo['directory'] ) && $repo['class'] === ForeignAPIRepo::class ) {
        $repo['directory'] = $wgUploadDirectory; // b/c
    }
    if ( !isset( $repo['backend'] ) ) {
        $repo['backend'] = $repo['name'] . '-backend';
    }
}
unset( $repo ); // no global pollution; destroy reference

$rcMaxAgeDays = $wgRCMaxAge / ( 3600 * 24 );
// Ensure that default user options are not invalid, since that breaks Special:Preferences
$wgDefaultUserOptions['rcdays'] = min(
    $wgDefaultUserOptions['rcdays'],
    ceil( $rcMaxAgeDays )
);
$wgDefaultUserOptions['watchlistdays'] = min(
    $wgDefaultUserOptions['watchlistdays'],
    ceil( $rcMaxAgeDays )
);
unset( $rcMaxAgeDays );

if ( $wgSkipSkin ) {
    // Hard deprecated in 1.34.
    wfDeprecated( '$wgSkipSkin – use $wgSkipSkins instead', '1.23' );
    $wgSkipSkins[] = $wgSkipSkin;
}

$wgSkipSkins[] = 'fallback';
$wgSkipSkins[] = 'apioutput';

if ( $wgLocalInterwiki ) {
    // Hard deprecated in 1.34.
    wfDeprecated( '$wgLocalInterwiki – use $wgLocalInterwikis instead', '1.23' );
    // @phan-suppress-next-line PhanUndeclaredVariableDim
    array_unshift( $wgLocalInterwikis, $wgLocalInterwiki );
}

// Set default shared prefix
if ( $wgSharedPrefix === false ) {
    $wgSharedPrefix = $wgDBprefix;
}

// Set default shared schema
if ( $wgSharedSchema === false ) {
    $wgSharedSchema = $wgDBmwschema;
}

if ( !$wgCookiePrefix ) {
    if ( $wgSharedDB && $wgSharedPrefix && in_array( 'user', $wgSharedTables ) ) {
        $wgCookiePrefix = $wgSharedDB . '_' . $wgSharedPrefix;
    } elseif ( $wgSharedDB && in_array( 'user', $wgSharedTables ) ) {
        $wgCookiePrefix = $wgSharedDB;
    } elseif ( $wgDBprefix ) {
        $wgCookiePrefix = $wgDBname . '_' . $wgDBprefix;
    } else {
        $wgCookiePrefix = $wgDBname;
    }
}
$wgCookiePrefix = strtr( $wgCookiePrefix, '=,; +."\'\\[', '__________' );

if ( $wgEnableEmail ) {
    $wgUseEnotif = $wgEnotifUserTalk || $wgEnotifWatchlist;
} else {
    // Disable all other email settings automatically if $wgEnableEmail
    // is set to false. - T65678
    $wgAllowHTMLEmail = false;
    $wgEmailAuthentication = false; // do not require auth if you're not sending email anyway
    $wgEnableUserEmail = false;
    $wgEnotifFromEditor = false;
    $wgEnotifImpersonal = false;
    $wgEnotifMaxRecips = 0;
    $wgEnotifMinorEdits = false;
    $wgEnotifRevealEditorAddress = false;
    $wgEnotifUseRealName = false;
    $wgEnotifUserTalk = false;
    $wgEnotifWatchlist = false;
    unset( $wgGroupPermissions['user']['sendemail'] );
    $wgUseEnotif = false;
    $wgUserEmailUseReplyTo = false;
    $wgUsersNotifiedOnAllChanges = [];
}

// $wgSysopEmailBans deprecated in 1.34
if ( isset( $wgSysopEmailBans ) && $wgSysopEmailBans === false ) {
    foreach ( $wgGroupPermissions as $group => $_ ) {
        unset( $wgGroupPermissions[$group]['blockemail'] );
    }
}

if ( $wgMetaNamespace === false ) {
    $wgMetaNamespace = str_replace( ' ', '_', $wgSitename );
}

// Ensure the minimum chunk size is less than PHP upload limits or the maximum
// upload size.
$wgMinUploadChunkSize = min(
    $wgMinUploadChunkSize,
    UploadBase::getMaxUploadSize( 'file' ),
    UploadBase::getMaxPhpUploadSize(),
    ( wfShorthandToInteger(
        ini_get( 'post_max_size' ) ?: ini_get( 'hhvm.server.max_post_size' ),
        PHP_INT_MAX
    ) ?: PHP_INT_MAX ) - 1024 // Leave some room for other POST parameters
);

$wgCanonicalNamespaceNames = NamespaceInfo::$canonicalNames;

if ( is_array( $wgExtraNamespaces ) ) {
    $wgCanonicalNamespaceNames += $wgExtraNamespaces;
}

// Hard-deprecate setting $wgDummyLanguageCodes in LocalSettings.php
if ( count( $wgDummyLanguageCodes ) !== 0 ) {
    wfDeprecated( '$wgDummyLanguageCodes', '1.29' );
}
// Merge in the legacy language codes, incorporating overrides from the config
$wgDummyLanguageCodes += [
    // Internal language codes of the private-use area which get mapped to
    // themselves.
    'qqq' => 'qqq', // Used for message documentation
    'qqx' => 'qqx', // Used for viewing message keys
] + $wgExtraLanguageCodes + LanguageCode::getDeprecatedCodeMapping();
// Merge in (inverted) BCP 47 mappings
foreach ( LanguageCode::getNonstandardLanguageCodeMapping() as $code => $bcp47 ) {
    $bcp47 = strtolower( $bcp47 ); // force case-insensitivity
    if ( !isset( $wgDummyLanguageCodes[$bcp47] ) ) {
        $wgDummyLanguageCodes[$bcp47] = $wgDummyLanguageCodes[$code] ?? $code;
    }
}

// These are now the same, always
// To determine the user language, use $wgLang->getCode()
$wgContLanguageCode = $wgLanguageCode;

// Temporary backwards-compatibility reading of old Squid-named CDN settings as of MediaWiki 1.34,
// to support sysadmins who fail to update their settings immediately:

if ( isset( $wgUseSquid ) ) {
    // If the sysadmin is still setting a value of $wgUseSquid to true but $wgUseCdn is the default of
    // false, to be safe, assume they do want this still, so enable it.
    if ( !$wgUseCdn && $wgUseSquid ) {
        $wgUseCdn = $wgUseSquid;
        wfDeprecated( '$wgUseSquid enabled but $wgUseCdn disabled; enabling CDN functions', '1.34' );
    }
} else {
    // Backwards-compatibility for extensions that read this value.
    $wgUseSquid = $wgUseCdn;
}

if ( isset( $wgSquidServers ) ) {
    // If the sysadmin is still setting a value of $wgSquidServers but $wgCdnServers is the default of
    // empty, to be safe, assume they do want these servers to be still used, so use them.
    if ( !empty( $wgSquidServers ) && empty( $wgCdnServers ) ) {
        $wgCdnServers = $wgSquidServers;
        wfDeprecated( '$wgSquidServers set, $wgCdnServers empty; using them', '1.34' );
    }
} else {
    // Backwards-compatibility for extensions that read this value.
    $wgSquidServers = $wgCdnServers;
}

if ( isset( $wgSquidServersNoPurge ) ) {
    // If the sysadmin is still setting values in $wgSquidServersNoPurge but $wgCdnServersNoPurge is
    // the default of empty, to be safe, assume they do want these servers to be still used, so use
    // them.
    if ( !empty( $wgSquidServersNoPurge ) && empty( $wgCdnServersNoPurge ) ) {
        $wgCdnServersNoPurge = $wgSquidServersNoPurge;
        wfDeprecated( '$wgSquidServersNoPurge set, $wgCdnServersNoPurge empty; using them', '1.34' );
    }
} else {
    // Backwards-compatibility for extensions that read this value.
    $wgSquidServersNoPurge = $wgCdnServersNoPurge;
}

if ( isset( $wgSquidMaxage ) ) {
    // If the sysadmin is still setting a value of $wgSquidMaxage and it's higher than $wgCdnMaxAge,
    // to be safe, assume they want the higher (lower performance requirement) value, so use that.
    if ( $wgCdnMaxAge < $wgSquidMaxage ) {
        $wgCdnMaxAge = $wgSquidMaxage;
        wfDeprecated( '$wgSquidMaxage set higher than $wgCdnMaxAge; using the higher value', '1.34' );
    }
} else {
    // Backwards-compatibility for extensions that read this value.
    $wgSquidMaxage = $wgCdnMaxAge;
}

// Blacklisted file extensions shouldn't appear on the "allowed" list
$wgFileExtensions = array_values( array_diff( $wgFileExtensions, $wgFileBlacklist ) );

if ( $wgInvalidateCacheOnLocalSettingsChange ) {
    Wikimedia\suppressWarnings();
    $wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', filemtime( "$IP/LocalSettings.php" ) ) );
    Wikimedia\restoreWarnings();
}

if ( $wgNewUserLog ) {
    // Add new user log type
    $wgLogTypes[] = 'newusers';
    $wgLogNames['newusers'] = 'newuserlogpage';
    $wgLogHeaders['newusers'] = 'newuserlogpagetext';
    $wgLogActionsHandlers['newusers/newusers'] = NewUsersLogFormatter::class;
    $wgLogActionsHandlers['newusers/create'] = NewUsersLogFormatter::class;
    $wgLogActionsHandlers['newusers/create2'] = NewUsersLogFormatter::class;
    $wgLogActionsHandlers['newusers/byemail'] = NewUsersLogFormatter::class;
    $wgLogActionsHandlers['newusers/autocreate'] = NewUsersLogFormatter::class;
}

if ( $wgPageCreationLog ) {
    // Add page creation log type
    $wgLogTypes[] = 'create';
    $wgLogActionsHandlers['create/create'] = LogFormatter::class;
}

if ( $wgPageLanguageUseDB ) {
    $wgLogTypes[] = 'pagelang';
    $wgLogActionsHandlers['pagelang/pagelang'] = PageLangLogFormatter::class;
}

if ( $wgCookieSecure === 'detect' ) {
    $wgCookieSecure = ( WebRequest::detectProtocol() === 'https' );
}

if ( $wgProfileOnly ) {
    // Hard deprecated in 1.34.
    wfDeprecated(
        '$wgProfileOnly set the log file in $wgDebugLogGroups[\'profileoutput\'] instead',
        '1.23'
    );
    $wgDebugLogGroups['profileoutput'] = $wgDebugLogFile;
    $wgDebugLogFile = '';
}

// Backwards compatibility with old password limits
if ( $wgMinimalPasswordLength !== false ) {
    $wgPasswordPolicy['policies']['default']['MinimalPasswordLength'] = $wgMinimalPasswordLength;
}

if ( $wgMaximalPasswordLength !== false ) {
    $wgPasswordPolicy['policies']['default']['MaximalPasswordLength'] = $wgMaximalPasswordLength;
}

if ( $wgPHPSessionHandling !== 'enable' &&
    $wgPHPSessionHandling !== 'warn' &&
    $wgPHPSessionHandling !== 'disable'
) {
    $wgPHPSessionHandling = 'warn';
}
if ( defined( 'MW_NO_SESSION' ) ) {
    // If the entry point wants no session, force 'disable' here unless they
    // specifically set it to the (undocumented) 'warn'.
    // @phan-suppress-next-line PhanUndeclaredConstant
    $wgPHPSessionHandling = MW_NO_SESSION === 'warn' ? 'warn' : 'disable';
}

MWDebug::setup();

// Reset the global service locator, so any services that have already been created will be
// re-created while taking into account any custom settings and extensions.
MediaWikiServices::resetGlobalInstance( new GlobalVarConfig(), 'quick' );

// Define a constant that indicates that the bootstrapping of the service locator
// is complete.
define( 'MW_SERVICE_BOOTSTRAP_COMPLETE', 1 );

MWExceptionHandler::installHandler();

// T48998: Bail out early if $wgArticlePath is non-absolute
foreach ( [ 'wgArticlePath', 'wgVariantArticlePath' ] as $varName ) {
    if ( $$varName && !preg_match( '/^(https?:\/\/|\/)/', $$varName ) ) {
        throw new FatalError(
            "If you use a relative URL for \$$varName, it must start " .
            'with a slash (<code>/</code>).<br><br>See ' .
            "<a href=\"https://www.mediawiki.org/wiki/Manual:\$$varName\">" .
            "https://www.mediawiki.org/wiki/Manual:\$$varName</a>."
        );
    }
}

if ( $wgCanonicalServer === false ) {
    $wgCanonicalServer = wfExpandUrl( $wgServer, PROTO_HTTP );
}

// Set server name
$serverParts = wfParseUrl( $wgCanonicalServer );
if ( $wgServerName !== false ) {
    wfWarn( '$wgServerName should be derived from $wgCanonicalServer, '
        . 'not customized. Overwriting $wgServerName.' );
}
$wgServerName = $serverParts['host'];
unset( $serverParts );

// Set defaults for configuration variables
// that are derived from the server name by default
// Note: $wgEmergencyContact and $wgPasswordSender may be false or empty string (T104142)
if ( !$wgEmergencyContact ) {
    $wgEmergencyContact = 'wikiadmin@' . $wgServerName;
}
if ( !$wgPasswordSender ) {
    $wgPasswordSender = 'apache@' . $wgServerName;
}
if ( !$wgNoReplyAddress ) {
    $wgNoReplyAddress = $wgPasswordSender;
}

if ( $wgSecureLogin && substr( $wgServer, 0, 2 ) !== '//' ) {
    $wgSecureLogin = false;
    wfWarn( 'Secure login was enabled on a server that only supports '
        . 'HTTP or HTTPS. Disabling secure login.' );
}

$wgVirtualRestConfig['global']['domain'] = $wgCanonicalServer;

// Now that GlobalFunctions is loaded, set defaults that depend on it.
if ( $wgTmpDirectory === false ) {
    $wgTmpDirectory = wfTempDir();
}

// We don't use counters anymore. Left here for extensions still
// expecting this to exist. Should be removed sometime 1.26 or later.
if ( !isset( $wgDisableCounters ) ) {
    $wgDisableCounters = true;
}

if ( $wgMainWANCache === false ) {
    // Setup a WAN cache from $wgMainCacheType with no relayer.
    // Sites using multiple datacenters can configure a relayer.
    $wgMainWANCache = 'mediawiki-main-default';
    $wgWANObjectCaches[$wgMainWANCache] = [
        'class'    => WANObjectCache::class,
        'cacheId'  => $wgMainCacheType
    ];
}

if ( $wgSharedDB && $wgSharedTables ) {
    // Apply $wgSharedDB table aliases for the local LB (all non-foreign DB connections)
    MediaWikiServices::getInstance()->getDBLoadBalancer()->setTableAliases(
        array_fill_keys(
            $wgSharedTables,
            [
                'dbname' => $wgSharedDB,
                'schema' => $wgSharedSchema,
                'prefix' => $wgSharedPrefix
            ]
        )
    );
}

// Raise the memory limit if it's too low
// Note, this makes use of wfDebug, and thus should not be before
// MWDebug::init() is called.
wfMemoryLimit( $wgMemoryLimit );

if ( is_null( $wgLocaltimezone ) ) {
    Wikimedia\suppressWarnings();
    $wgLocaltimezone = date_default_timezone_get();
    Wikimedia\restoreWarnings();
}

date_default_timezone_set( $wgLocaltimezone );
if ( is_null( $wgLocalTZoffset ) ) {
    $wgLocalTZoffset = (int)date( 'Z' ) / 60;
}
// The part after the System| is ignored, but rest of MW fills it
// out as the local offset.
$wgDefaultUserOptions['timecorrection'] = "System|$wgLocalTZoffset";

if ( !$wgDBerrorLogTZ ) {
    $wgDBerrorLogTZ = $wgLocaltimezone;
}

// Initialize the request object in $wgRequest
$wgRequest = RequestContext::getMain()->getRequest(); // BackCompat
// Set user IP/agent information for agent session consistency purposes
$cpPosInfo = LBFactory::getCPInfoFromCookieValue(
    // The cookie has no prefix and is set by MediaWiki::preOutputCommit()
    $wgRequest->getCookie( 'cpPosIndex', '' ),
    // Mitigate broken client-side cookie expiration handling (T190082)
    time() - ChronologyProtector::POSITION_COOKIE_TTL
);
MediaWikiServices::getInstance()->getDBLoadBalancerFactory()->setRequestInfo( [
    'IPAddress' => $wgRequest->getIP(),
    'UserAgent' => $wgRequest->getHeader( 'User-Agent' ),
    'ChronologyProtection' => $wgRequest->getHeader( 'MediaWiki-Chronology-Protection' ),
    'ChronologyPositionIndex' => $wgRequest->getInt( 'cpPosIndex', $cpPosInfo['index'] ),
    'ChronologyClientId' => $cpPosInfo['clientId']
        ?? $wgRequest->getHeader( 'MediaWiki-Chronology-Client-Id' )
] );
unset( $cpPosInfo );
// Make sure that object caching does not undermine the ChronologyProtector improvements
if ( $wgRequest->getCookie( 'UseDC', '' ) === 'master' ) {
    // The user is pinned to the primary DC, meaning that they made recent changes which should
    // be reflected in their subsequent web requests. Avoid the use of interim cache keys because
    // they use a blind TTL and could be stale if an object changes twice in a short time span.
    MediaWikiServices::getInstance()->getMainWANObjectCache()->useInterimHoldOffCaching( false );
}

// Useful debug output
if ( $wgCommandLineMode ) {
    if ( isset( $self ) ) {
        wfDebug( "\n\nStart command line script $self\n" );
    }
} else {
    $debug = "\n\nStart request {$wgRequest->getMethod()} {$wgRequest->getRequestURL()}\n";
    $debug .= "HTTP HEADERS:\n";
    foreach ( $wgRequest->getAllHeaders() as $name => $value ) {
        $debug .= "$name: $value\n";
    }
    wfDebug( $debug );
}

$wgMemc = ObjectCache::getLocalClusterInstance();
$messageMemc = wfGetMessageCacheStorage();

// Most of the config is out, some might want to run hooks here.
Hooks::run( 'SetupAfterCache' );

$wgContLang = MediaWikiServices::getInstance()->getContentLanguage();

// Now that variant lists may be available...
$wgRequest->interpolateTitle();

$wgInitialSessionId = null;
if ( !defined( 'MW_NO_SESSION' ) && !$wgCommandLineMode ) {
    // If session.auto_start is there, we can't touch session name
    if ( $wgPHPSessionHandling !== 'disable' && !wfIniGetBool( 'session.auto_start' ) ) {
        session_name( $wgSessionName ?: $wgCookiePrefix . '_session' );
    }

    // Create the SessionManager singleton and set up our session handler,
    // unless we're specifically asked not to.
    if ( !defined( 'MW_NO_SESSION_HANDLER' ) ) {
        MediaWiki\Session\PHPSessionHandler::install(
            MediaWiki\Session\SessionManager::singleton()
        );
    }

    // Initialize the session
    try {
        $session = MediaWiki\Session\SessionManager::getGlobalSession();
    } catch ( MediaWiki\Session\SessionOverflowException $ex ) {
        // The exception is because the request had multiple possible
        // sessions tied for top priority. Report this to the user.
        $list = [];
        foreach ( $ex->getSessionInfos() as $info ) {
            $list[] = $info->getProvider()->describe( $wgContLang );
        }
        $list = $wgContLang->listToText( $list );
        throw new HttpError( 400,
            Message::newFromKey( 'sessionmanager-tie', $list )->inLanguage( $wgContLang )->plain()
        );
    }

    if ( $session->isPersistent() ) {
        $wgInitialSessionId = $session->getSessionId();
    }

    $session->renew();
    if ( MediaWiki\Session\PHPSessionHandler::isEnabled() &&
        ( $session->isPersistent() || $session->shouldRememberUser() ) &&
        session_id() !== $session->getId()
    ) {
        // Start the PHP-session for backwards compatibility
        if ( session_id() !== '' ) {
            wfDebugLog( 'session', 'PHP session {old_id} was already started, changing to {new_id}', 'all', [
                'old_id' => session_id(),
                'new_id' => $session->getId(),
            ] );
            session_write_close();
        }
        session_id( $session->getId() );
        session_start();
    }

    unset( $session );
} else {
    // Even if we didn't set up a global Session, still install our session
    // handler unless specifically requested not to.
    if ( !defined( 'MW_NO_SESSION_HANDLER' ) ) {
        MediaWiki\Session\PHPSessionHandler::install(
            MediaWiki\Session\SessionManager::singleton()
        );
    }
}

$wgUser = RequestContext::getMain()->getUser(); // BackCompat

$wgLang = new StubUserLang;

$wgOut = RequestContext::getMain()->getOutput(); // BackCompat

$wgParser = new StubObject( 'wgParser', function () {
    return MediaWikiServices::getInstance()->getParser();
} );

$wgTitle = null;

// Extension setup functions
// Entries should be added to this variable during the inclusion
// of the extension file. This allows the extension to perform
// any necessary initialisation in the fully initialised environment
foreach ( $wgExtensionFunctions as $func ) {
    call_user_func( $func );
}

// If the session user has a 0 id but a valid name, that means we need to
// autocreate it.
if ( !defined( 'MW_NO_SESSION' ) && !$wgCommandLineMode ) {
    $sessionUser = MediaWiki\Session\SessionManager::getGlobalSession()->getUser();
    if ( $sessionUser->getId() === 0 && User::isValidUserName( $sessionUser->getName() ) ) {
        $res = MediaWiki\Auth\AuthManager::singleton()->autoCreateUser(
            $sessionUser,
            MediaWiki\Auth\AuthManager::AUTOCREATE_SOURCE_SESSION,
            true
        );
        \MediaWiki\Logger\LoggerFactory::getInstance( 'authevents' )->info( 'Autocreation attempt', [
            'event' => 'autocreate',
            'status' => $res,
        ] );
        unset( $res );
    }
    unset( $sessionUser );
}

if ( !$wgCommandLineMode ) {
    Pingback::schedulePingback();
}

$wgFullyInitialised = true;