includes/Block.php

   1 <?php
   2 /**
   3  * Blocks and bans object
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * The block class
   9  * All the functions in this class assume the object is either explicitly
  10  * loaded or filled. It is not load-on-demand. There are no accessors.
  11  *
  12  * Globals used: $wgAutoblockExpiry, $wgAntiLockFlags
  13  *
  14  * @todo This could be used everywhere, but it isn't.
  15  * @package MediaWiki
  16  */
  17 class Block
  18 {
  19         /* public*/ var $mAddress, $mUser, $mBy, $mReason, $mTimestamp, $mAuto, $mId, $mExpiry,
  20                             $mRangeStart, $mRangeEnd, $mAnonOnly, $mEnableAutoblock;
  21         /* private */ var $mNetworkBits, $mIntegerAddr, $mForUpdate, $mFromMaster, $mByName;
  22
  23         const EB_KEEP_EXPIRED = 1;
  24         const EB_FOR_UPDATE = 2;
  25         const EB_RANGE_ONLY = 4;
  26
  27         function Block( $address = '', $user = 0, $by = 0, $reason = '',
  28                 $timestamp = '' , $auto = 0, $expiry = '', $anonOnly = 0, $createAccount = 0, $enableAutoblock = 0 )
  29         {
  30                 $this->mId = 0;
  31                 $this->mAddress = $address;
  32                 $this->mUser = $user;
  33                 $this->mBy = $by;
  34                 $this->mReason = $reason;
  35                 $this->mTimestamp = wfTimestamp(TS_MW,$timestamp);
  36                 $this->mAuto = $auto;
  37                 $this->mAnonOnly = $anonOnly;
  38                 $this->mCreateAccount = $createAccount;
  39                 $this->mExpiry = self::decodeExpiry( $expiry );
  40                 $this->mEnableAutoblock = $enableAutoblock;
  41
  42                 $this->mForUpdate = false;
  43                 $this->mFromMaster = false;
  44                 $this->mByName = false;
  45                 $this->initialiseRange();
  46         }
  47
  48         static function newFromDB( $address, $user = 0, $killExpired = true )
  49         {
  50                 $block = new Block();
  51                 $block->load( $address, $user, $killExpired );
  52                 if ( $block->isValid() ) {
  53                         return $block;
  54                 } else {
  55                         return null;
  56                 }
  57         }
  58
  59         static function newFromID( $id )
  60         {
  61                 $dbr =& wfGetDB( DB_SLAVE );
  62                 $res = $dbr->resultObject( $dbr->select( 'ipblocks', '*',
  63                         array( 'ipb_id' => $id ), __METHOD__ ) );
  64                 $block = new Block;
  65                 if ( $block->loadFromResult( $res ) ) {
  66                         return $block;
  67                 } else {
  68                         return null;
  69                 }
  70         }
  71
  72         function clear()
  73         {
  74                 $this->mAddress = $this->mReason = $this->mTimestamp = '';
  75                 $this->mId = $this->mAnonOnly = $this->mCreateAccount =
  76                         $this->mEnableAutoblock = $this->mAuto = $this->mUser =
  77                         $this->mBy = 0;
  78                 $this->mByName = false;
  79         }
  80
  81         /**
  82          * Get the DB object and set the reference parameter to the query options
  83          */
  84         function &getDBOptions( &$options )
  85         {
  86                 global $wgAntiLockFlags;
  87                 if ( $this->mForUpdate || $this->mFromMaster ) {
  88                         $db =& wfGetDB( DB_MASTER );
  89                         if ( !$this->mForUpdate || ($wgAntiLockFlags & ALF_NO_BLOCK_LOCK) ) {
  90                                 $options = array();
  91                         } else {
  92                                 $options = array( 'FOR UPDATE' );
  93                         }
  94                 } else {
  95                         $db =& wfGetDB( DB_SLAVE );
  96                         $options = array();
  97                 }
  98                 return $db;
  99         }
 100
 101         /**
 102          * Get a ban from the DB, with either the given address or the given username
 103          *
 104          * @param string $address The IP address of the user, or blank to skip IP blocks
 105          * @param integer $user The user ID, or zero for anonymous users
 106          * @param bool $killExpired Whether to delete expired rows while loading
 107          *
 108          */
 109         function load( $address = '', $user = 0, $killExpired = true )
 110         {
 111                 wfDebug( "Block::load: '$address', '$user', $killExpired\n" );
 112
 113                 $options = array();
 114                 $db =& $this->getDBOptions( $options );
 115
 116                 if ( 0 == $user && $address == '' ) {
 117                         # Invalid user specification, not blocked
 118                         $this->clear();
 119                         return false;
 120                 }
 121
 122                 # Try user block
 123                 if ( $user ) {
 124                         $res = $db->resultObject( $db->select( 'ipblocks', '*', array( 'ipb_user' => $user ),
 125                                 __METHOD__, $options ) );
 126                         if ( $this->loadFromResult( $res, $killExpired ) ) {
 127                                 return true;
 128                         }
 129
 130                         $userObject = User::newFromId($user);
 131
 132                         if ($userObject->isAllowed('ipblock-exempt') ) {
 133                                 $address = '';
 134                         }
 135                 }
 136
 137                 # Try IP block
 138                 # TODO: improve performance by merging this query with the autoblock one
 139                 # Slightly tricky while handling killExpired as well
 140                 if ( $address ) {
 141                         $conds = array( 'ipb_address' => $address, 'ipb_auto' => 0 );
 142                         $res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
 143                         if ( $this->loadFromResult( $res, $killExpired ) ) {
 144                                 if ( $user && $this->mAnonOnly ) {
 145                                         # Block is marked anon-only
 146                                         # Whitelist this IP address against autoblocks and range blocks
 147                                         $this->clear();
 148                                         return false;
 149                                 } else {
 150                                         return true;
 151                                 }
 152                         }
 153                 }
 154
 155                 # Try range block
 156                 if ( $this->loadRange( $address, $killExpired, $user == 0 ) ) {
 157                         if ( $user && $this->mAnonOnly ) {
 158                                 $this->clear();
 159                                 return false;
 160                         } else {
 161                                 return true;
 162                         }
 163                 }
 164
 165                 # Try autoblock
 166                 if ( $address ) {
 167                         $conds = array( 'ipb_address' => $address, 'ipb_auto' => 1 );
 168                         if ( $user ) {
 169                                 $conds['ipb_anon_only'] = 0;
 170                         }
 171                         $res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
 172                         if ( $this->loadFromResult( $res, $killExpired ) ) {
 173                                 return true;
 174                         }
 175                 }
 176
 177                 # Give up
 178                 $this->clear();
 179                 return false;
 180         }
 181
 182         /**
 183          * Fill in member variables from a result wrapper
 184          */
 185         function loadFromResult( ResultWrapper $res, $killExpired = true ) {
 186                 $ret = false;
 187                 if ( 0 != $res->numRows() ) {
 188                         # Get first block
 189                         $row = $res->fetchObject();
 190                         $this->initFromRow( $row );
 191
 192                         if ( $killExpired ) {
 193                                 # If requested, delete expired rows
 194                                 do {
 195                                         $killed = $this->deleteIfExpired();
 196                                         if ( $killed ) {
 197                                                 $row = $res->fetchObject();
 198                                                 if ( $row ) {
 199                                                         $this->initFromRow( $row );
 200                                                 }
 201                                         }
 202                                 } while ( $killed && $row );
 203
 204                                 # If there were any left after the killing finished, return true
 205                                 if ( $row ) {
 206                                         $ret = true;
 207                                 }
 208                         } else {
 209                                 $ret = true;
 210                         }
 211                 }
 212                 $res->free();
 213                 return $ret;
 214         }
 215
 216         /**
 217          * Search the database for any range blocks matching the given address, and
 218          * load the row if one is found.
 219          */
 220         function loadRange( $address, $killExpired = true )
 221         {
 222                 $iaddr = IP::toHex( $address );
 223                 if ( $iaddr === false ) {
 224                         # Invalid address
 225                         return false;
 226                 }
 227
 228                 # Only scan ranges which start in this /16, this improves search speed
 229                 # Blocks should not cross a /16 boundary.
 230                 $range = substr( $iaddr, 0, 4 );
 231
 232                 $options = array();
 233                 $db =& $this->getDBOptions( $options );
 234                 $conds = array(
 235                         "ipb_range_start LIKE '$range%'",
 236                         "ipb_range_start <= '$iaddr'",
 237                         "ipb_range_end >= '$iaddr'"
 238                 );
 239
 240                 $res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
 241                 $success = $this->loadFromResult( $res, $killExpired );
 242                 return $success;
 243         }
 244
 245         /**
 246          * Determine if a given integer IPv4 address is in a given CIDR network
 247          * @deprecated Use IP::isInRange
 248          */
 249         function isAddressInRange( $addr, $range ) {
 250                 return IP::isInRange( $addr, $range );
 251         }
 252
 253         function initFromRow( $row )
 254         {
 255                 $this->mAddress = $row->ipb_address;
 256                 $this->mReason = $row->ipb_reason;
 257                 $this->mTimestamp = wfTimestamp(TS_MW,$row->ipb_timestamp);
 258                 $this->mUser = $row->ipb_user;
 259                 $this->mBy = $row->ipb_by;
 260                 $this->mAuto = $row->ipb_auto;
 261                 $this->mAnonOnly = $row->ipb_anon_only;
 262                 $this->mCreateAccount = $row->ipb_create_account;
 263                 $this->mEnableAutoblock = $row->ipb_enable_autoblock;
 264                 $this->mId = $row->ipb_id;
 265                 $this->mExpiry = self::decodeExpiry( $row->ipb_expiry );
 266                 if ( isset( $row->user_name ) ) {
 267                         $this->mByName = $row->user_name;
 268                 } else {
 269                         $this->mByName = false;
 270                 }
 271                 $this->mRangeStart = $row->ipb_range_start;
 272                 $this->mRangeEnd = $row->ipb_range_end;
 273         }
 274
 275         function initialiseRange()
 276         {
 277                 $this->mRangeStart = '';
 278                 $this->mRangeEnd = '';
 279
 280                 if ( $this->mUser == 0 ) {
 281                         list( $this->mRangeStart, $this->mRangeEnd ) = IP::parseRange( $this->mAddress );
 282                 }
 283         }
 284
 285         /**
 286          * Callback with a Block object for every block
 287          * @return integer number of blocks;
 288          */
 289         /*static*/ function enumBlocks( $callback, $tag, $flags = 0 )
 290         {
 291                 global $wgAntiLockFlags;
 292
 293                 $block = new Block();
 294                 if ( $flags & Block::EB_FOR_UPDATE ) {
 295                         $db =& wfGetDB( DB_MASTER );
 296                         if ( $wgAntiLockFlags & ALF_NO_BLOCK_LOCK ) {
 297                                 $options = '';
 298                         } else {
 299                                 $options = 'FOR UPDATE';
 300                         }
 301                         $block->forUpdate( true );
 302                 } else {
 303                         $db =& wfGetDB( DB_SLAVE );
 304                         $options = '';
 305                 }
 306                 if ( $flags & Block::EB_RANGE_ONLY ) {
 307                         $cond = " AND ipb_range_start <> ''";
 308                 } else {
 309                         $cond = '';
 310                 }
 311
 312                 $now = wfTimestampNow();
 313
 314                 list( $ipblocks, $user ) = $db->tableNamesN( 'ipblocks', 'user' );
 315
 316                 $sql = "SELECT $ipblocks.*,user_name FROM $ipblocks,$user " .
 317                         "WHERE user_id=ipb_by $cond ORDER BY ipb_timestamp DESC $options";
 318                 $res = $db->query( $sql, 'Block::enumBlocks' );
 319                 $num_rows = $db->numRows( $res );
 320
 321                 while ( $row = $db->fetchObject( $res ) ) {
 322                         $block->initFromRow( $row );
 323                         if ( ( $flags & Block::EB_RANGE_ONLY ) && $block->mRangeStart == '' ) {
 324                                 continue;
 325                         }
 326
 327                         if ( !( $flags & Block::EB_KEEP_EXPIRED ) ) {
 328                                 if ( $block->mExpiry && $now > $block->mExpiry ) {
 329                                         $block->delete();
 330                                 } else {
 331                                         call_user_func( $callback, $block, $tag );
 332                                 }
 333                         } else {
 334                                 call_user_func( $callback, $block, $tag );
 335                         }
 336                 }
 337                 $db->freeResult( $res );
 338                 return $num_rows;
 339         }
 340
 341         function delete()
 342         {
 343                 if (wfReadOnly()) {
 344                         return false;
 345                 }
 346                 if ( !$this->mId ) {
 347                         throw new MWException( "Block::delete() now requires that the mId member be filled\n" );
 348                 }
 349
 350                 $dbw =& wfGetDB( DB_MASTER );
 351                 $dbw->delete( 'ipblocks', array( 'ipb_id' => $this->mId ), __METHOD__ );
 352                 return $dbw->affectedRows() > 0;
 353         }
 354
 355         /**
 356         * Insert a block into the block table.
 357         *@return Whether or not the insertion was successful.
 358         */
 359         function insert()
 360         {
 361                 wfDebug( "Block::insert; timestamp {$this->mTimestamp}\n" );
 362                 $dbw =& wfGetDB( DB_MASTER );
 363                 $dbw->begin();
 364
 365                 # Unset ipb_anon_only for user blocks, makes no sense
 366                 if ( $this->mUser ) {
 367                         $this->mAnonOnly = 0;
 368                 }
 369
 370                 # Unset ipb_enable_autoblock for IP blocks, makes no sense
 371                 if ( !$this->mUser ) {
 372                         $this->mEnableAutoblock = 0;
 373                 }
 374
 375                 # Don't collide with expired blocks
 376                 Block::purgeExpired();
 377
 378                 $ipb_id = $dbw->nextSequenceValue('ipblocks_ipb_id_val');
 379                 $dbw->insert( 'ipblocks',
 380                         array(
 381                                 'ipb_id' => $ipb_id,
 382                                 'ipb_address' => $this->mAddress,
 383                                 'ipb_user' => $this->mUser,
 384                                 'ipb_by' => $this->mBy,
 385                                 'ipb_reason' => $this->mReason,
 386                                 'ipb_timestamp' => $dbw->timestamp($this->mTimestamp),
 387                                 'ipb_auto' => $this->mAuto,
 388                                 'ipb_anon_only' => $this->mAnonOnly,
 389                                 'ipb_create_account' => $this->mCreateAccount,
 390                                 'ipb_enable_autoblock' => $this->mEnableAutoblock,
 391                                 'ipb_expiry' => self::encodeExpiry( $this->mExpiry, $dbw ),
 392                                 'ipb_range_start' => $this->mRangeStart,
 393                                 'ipb_range_end' => $this->mRangeEnd,
 394                         ), 'Block::insert', array( 'IGNORE' )
 395                 );
 396                 $affected = $dbw->affectedRows();
 397                 $dbw->commit();
 398
 399                 if ($affected)
 400                         $this->doRetroactiveAutoblock();
 401
 402                 return $affected;
 403         }
 404
 405         /**
 406         * Retroactively autoblocks the last IP used by the user (if it is a user)
 407         * blocked by this Block.
 408         *@return Whether or not a retroactive autoblock was made.
 409         */
 410         function doRetroactiveAutoblock() {
 411                 $dbr = wfGetDB( DB_SLAVE );
 412                 #If autoblock is enabled, autoblock the LAST IP used
 413                 # - stolen shamelessly from CheckUser_body.php
 414
 415                 if ($this->mEnableAutoblock && $this->mUser) {
 416                         wfDebug("Doing retroactive autoblocks for " . $this->mAddress . "\n");
 417
 418                         $row = $dbr->selectRow( 'recentchanges', array( 'rc_ip' ), array( 'rc_user_text' => $this->mAddress ),
 419                                 __METHOD__ , array( 'ORDER BY' => 'rc_timestamp DESC' ) );
 420
 421                         if ( !$row || !$row->rc_ip ) {
 422                                 #No results, don't autoblock anything
 423                                 wfDebug("No IP found to retroactively autoblock\n");
 424                         } else {
 425                                 #Limit is 1, so no loop needed.
 426                                 $retroblockip = $row->rc_ip;
 427                                 return $this->doAutoblock($retroblockip);
 428                         }
 429                 }
 430         }
 431
 432         /**
 433         * Autoblocks the given IP, referring to this Block.
 434         * @param $autoblockip The IP to autoblock.
 435         * @return bool Whether or not an autoblock was inserted.
 436         */
 437         function doAutoblock( $autoblockip ) {
 438                 # Check if this IP address is already blocked
 439                 $dbw =& wfGetDB( DB_MASTER );
 440                 $dbw->begin();
 441
 442                 # If autoblocks are disabled, go away.
 443                 if ( !$this->mEnableAutoblock ) {
 444                         return;
 445                 }
 446
 447                 # Check for presence on the autoblock whitelist
 448                 # TODO cache this?
 449                 $lines = explode( "\n", wfMsgForContentNoTrans( 'autoblock_whitelist' ) );
 450
 451                 $ip = $autoblockip;
 452
 453                 wfDebug("Checking the autoblock whitelist..\n");
 454
 455                 foreach( $lines as $line ) {
 456                         # List items only
 457                         if ( substr( $line, 0, 1 ) !== '*' ) {
 458                                 continue;
 459                         }
 460
 461                         $wlEntry = substr($line, 1);
 462                         $wlEntry = trim($wlEntry);
 463
 464                         wfDebug("Checking $ip against $wlEntry...");
 465
 466                         # Is the IP in this range?
 467                         if (IP::isInRange( $ip, $wlEntry )) {
 468                                 wfDebug(" IP $ip matches $wlEntry, not autoblocking\n");
 469                                 #$autoblockip = null; # Don't autoblock a whitelisted IP.
 470                                 return; #This /SHOULD/ introduce a dummy block - but
 471                                         # I don't know a safe way to do so. -werdna
 472                         } else {
 473                                 wfDebug( " No match\n" );
 474                         }
 475                 }
 476
 477                 # It's okay to autoblock. Go ahead and create/insert the block.
 478
 479                 $ipblock = Block::newFromDB( $autoblockip );
 480                 if ( $ipblock ) {
 481                         # If the user is already blocked. Then check if the autoblock would
 482                         # exceed the user block. If it would exceed, then do nothing, else
 483                         # prolong block time
 484                         if ($this->mExpiry &&
 485                         ($this->mExpiry < Block::getAutoblockExpiry($ipblock->mTimestamp))) {
 486                                 return;
 487                         }
 488                         # Just update the timestamp
 489                         $ipblock->updateTimestamp();
 490                         return;
 491                 } else {
 492                         $ipblock = new Block;
 493                 }
 494
 495                 # Make a new block object with the desired properties
 496                 wfDebug( "Autoblocking {$this->mAddress}@" . $autoblockip . "\n" );
 497                 $ipblock->mAddress = $autoblockip;
 498                 $ipblock->mUser = 0;
 499                 $ipblock->mBy = $this->mBy;
 500                 $ipblock->mReason = wfMsgForContent( 'autoblocker', $this->mAddress, $this->mReason );
 501                 $ipblock->mTimestamp = wfTimestampNow();
 502                 $ipblock->mAuto = 1;
 503                 $ipblock->mCreateAccount = $this->mCreateAccount;
 504
 505                 # If the user is already blocked with an expiry date, we don't
 506                 # want to pile on top of that!
 507                 if($this->mExpiry) {
 508                         $ipblock->mExpiry = min ( $this->mExpiry, Block::getAutoblockExpiry( $this->mTimestamp ));
 509                 } else {
 510                         $ipblock->mExpiry = Block::getAutoblockExpiry( $this->mTimestamp );
 511                 }
 512                 # Insert it
 513                 return $ipblock->insert();
 514         }
 515
 516         function deleteIfExpired()
 517         {
 518                 $fname = 'Block::deleteIfExpired';
 519                 wfProfileIn( $fname );
 520                 if ( $this->isExpired() ) {
 521                         wfDebug( "Block::deleteIfExpired() -- deleting\n" );
 522                         $this->delete();
 523                         $retVal = true;
 524                 } else {
 525                         wfDebug( "Block::deleteIfExpired() -- not expired\n" );
 526                         $retVal = false;
 527                 }
 528                 wfProfileOut( $fname );
 529                 return $retVal;
 530         }
 531
 532         function isExpired()
 533         {
 534                 wfDebug( "Block::isExpired() checking current " . wfTimestampNow() . " vs $this->mExpiry\n" );
 535                 if ( !$this->mExpiry ) {
 536                         return false;
 537                 } else {
 538                         return wfTimestampNow() > $this->mExpiry;
 539                 }
 540         }
 541
 542         function isValid()
 543         {
 544                 return $this->mAddress != '';
 545         }
 546
 547         function updateTimestamp()
 548         {
 549                 if ( $this->mAuto ) {
 550                         $this->mTimestamp = wfTimestamp();
 551                         $this->mExpiry = Block::getAutoblockExpiry( $this->mTimestamp );
 552
 553                         $dbw =& wfGetDB( DB_MASTER );
 554                         $dbw->update( 'ipblocks',
 555                                 array( /* SET */
 556                                         'ipb_timestamp' => $dbw->timestamp($this->mTimestamp),
 557                                         'ipb_expiry' => $dbw->timestamp($this->mExpiry),
 558                                 ), array( /* WHERE */
 559                                         'ipb_address' => $this->mAddress
 560                                 ), 'Block::updateTimestamp'
 561                         );
 562                 }
 563         }
 564
 565         /*
 566         function getIntegerAddr()
 567         {
 568                 return $this->mIntegerAddr;
 569         }
 570
 571         function getNetworkBits()
 572         {
 573                 return $this->mNetworkBits;
 574         }*/
 575
 576         /**
 577          * @return The blocker user ID.
 578          */
 579         public function getBy() {
 580                 return $this->mBy;
 581         }
 582
 583         /**
 584          * @return The blocker user name.
 585          */
 586         function getByName()
 587         {
 588                 if ( $this->mByName === false ) {
 589                         $this->mByName = User::whoIs( $this->mBy );
 590                 }
 591                 return $this->mByName;
 592         }
 593
 594         function forUpdate( $x = NULL ) {
 595                 return wfSetVar( $this->mForUpdate, $x );
 596         }
 597
 598         function fromMaster( $x = NULL ) {
 599                 return wfSetVar( $this->mFromMaster, $x );
 600         }
 601
 602         function getRedactedName() {
 603                 if ( $this->mAuto ) {
 604                         return '#' . $this->mId;
 605                 } else {
 606                         return $this->mAddress;
 607                 }
 608         }
 609
 610         /**
 611          * Encode expiry for DB
 612          */
 613         static function encodeExpiry( $expiry, $db ) {
 614                 if ( $expiry == '' || $expiry == Block::infinity() ) {
 615                         return Block::infinity();
 616                 } else {
 617                         return $db->timestamp( $expiry );
 618                 }
 619         }
 620
 621         /**
 622          * Decode expiry which has come from the DB
 623          */
 624         static function decodeExpiry( $expiry ) {
 625                 if ( $expiry == '' || $expiry == Block::infinity() ) {
 626                         return Block::infinity();
 627                 } else {
 628                         return wfTimestamp( TS_MW, $expiry );
 629                 }
 630         }
 631
 632         static function getAutoblockExpiry( $timestamp )
 633         {
 634                 global $wgAutoblockExpiry;
 635                 return wfTimestamp( TS_MW, wfTimestamp( TS_UNIX, $timestamp ) + $wgAutoblockExpiry );
 636         }
 637
 638         static function normaliseRange( $range )
 639         {
 640                 $parts = explode( '/', $range );
 641                 if ( count( $parts ) == 2 ) {
 642                         $shift = 32 - $parts[1];
 643                         $ipint = IP::toUnsigned( $parts[0] );
 644                         $ipint = $ipint >> $shift << $shift;
 645                         $newip = long2ip( $ipint );
 646                         $range = "$newip/{$parts[1]}";
 647                 }
 648                 return $range;
 649         }
 650
 651         /**
 652          * Purge expired blocks from the ipblocks table
 653          */
 654         static function purgeExpired() {
 655                 $dbw =& wfGetDB( DB_MASTER );
 656                 $dbw->delete( 'ipblocks', array( 'ipb_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ), __METHOD__ );
 657         }
 658
 659         static function infinity() {
 660                 # This is a special keyword for timestamps in PostgreSQL, and
 661                 # works with CHAR(14) as well because "i" sorts after all numbers.
 662                 return 'infinity';
 663
 664                 /*
 665                 static $infinity;
 666                 if ( !isset( $infinity ) ) {
 667                         $dbr =& wfGetDB( DB_SLAVE );
 668                         $infinity = $dbr->bigTimestamp();
 669                 }
 670                 return $infinity;
 671                  */
 672         }
 673
 674 }
 675 ?>