includes/ImportXMLReader.php

   1 <?php
   2 /**
   3  * implements Special:Import
   4  * @ingroup SpecialPage
   5  */
   6 class WikiImporter {
   7         private $reader = null;
   8         private $mLogItemCallback, $mUploadCallback, $mRevisionCallback, $mPageCallback;
   9         private $mSiteInfoCallback, $mTargetNamespace, $mPageOutCallback;
  10         private $mDebug;
  11
  12         /**
  13          * Creates an ImportXMLReader drawing from the source provided
  14         */
  15         function __construct( $source ) {
  16                 $this->reader = new XMLReader2();
  17
  18                 stream_wrapper_register( 'uploadsource', 'UploadSourceAdapter' );
  19                 $id = UploadSourceAdapter::registerSource( $source );
  20                 $this->reader->open( "uploadsource://$id" );
  21
  22                 // Default callbacks
  23                 $this->setRevisionCallback( array( $this, "importRevision" ) );
  24                 $this->setUploadCallback( array( $this, 'importUpload' ) );
  25                 $this->setLogItemCallback( array( $this, 'importLogItem' ) );
  26                 $this->setPageOutCallback( array( $this, 'finishImportPage' ) );
  27         }
  28
  29         private function throwXmlError( $err ) {
  30                 $this->debug( "FAILURE: $err" );
  31                 wfDebug( "WikiImporter XML error: $err\n" );
  32         }
  33
  34         private function debug( $data ) {
  35                 if( $this->mDebug ) {
  36                         wfDebug( "IMPORT: $data\n" );
  37                 }
  38         }
  39
  40         private function warn( $data ) {
  41                 wfDebug( "IMPORT: $data\n" );
  42         }
  43
  44         private function notice( $data ) {
  45                 global $wgCommandLineMode;
  46                 if( $wgCommandLineMode ) {
  47                         print "$data\n";
  48                 } else {
  49                         global $wgOut;
  50                         $wgOut->addHTML( "<li>" . htmlspecialchars( $data ) . "</li>\n" );
  51                 }
  52         }
  53
  54         /**
  55          * Set debug mode...
  56          */
  57         function setDebug( $debug ) {
  58                 $this->mDebug = $debug;
  59         }
  60
  61         /**
  62          * Sets the action to perform as each new page in the stream is reached.
  63          * @param $callback callback
  64          * @return callback
  65          */
  66         public function setPageCallback( $callback ) {
  67                 $previous = $this->mPageCallback;
  68                 $this->mPageCallback = $callback;
  69                 return $previous;
  70         }
  71
  72         /**
  73          * Sets the action to perform as each page in the stream is completed.
  74          * Callback accepts the page title (as a Title object), a second object
  75          * with the original title form (in case it's been overridden into a
  76          * local namespace), and a count of revisions.
  77          *
  78          * @param $callback callback
  79          * @return callback
  80          */
  81         public function setPageOutCallback( $callback ) {
  82                 $previous = $this->mPageOutCallback;
  83                 $this->mPageOutCallback = $callback;
  84                 return $previous;
  85         }
  86
  87         /**
  88          * Sets the action to perform as each page revision is reached.
  89          * @param $callback callback
  90          * @return callback
  91          */
  92         public function setRevisionCallback( $callback ) {
  93                 $previous = $this->mRevisionCallback;
  94                 $this->mRevisionCallback = $callback;
  95                 return $previous;
  96         }
  97
  98         /**
  99          * Sets the action to perform as each file upload version is reached.
 100          * @param $callback callback
 101          * @return callback
 102          */
 103         public function setUploadCallback( $callback ) {
 104                 $previous = $this->mUploadCallback;
 105                 $this->mUploadCallback = $callback;
 106                 return $previous;
 107         }
 108
 109         /**
 110          * Sets the action to perform as each log item reached.
 111          * @param $callback callback
 112          * @return callback
 113          */
 114         public function setLogItemCallback( $callback ) {
 115                 $previous = $this->mLogItemCallback;
 116                 $this->mLogItemCallback = $callback;
 117                 return $previous;
 118         }
 119
 120         /**
 121          * Sets the action to perform when site info is encountered
 122          * @param $callback callback
 123          * @return callback
 124          */
 125         public function setSiteInfoCallback( $callback ) {
 126                 $previous = $this->mSiteInfoCallback;
 127                 $this->mSiteInfoCallback = $callback;
 128                 return $previous;
 129         }
 130
 131         /**
 132          * Set a target namespace to override the defaults
 133          */
 134         public function setTargetNamespace( $namespace ) {
 135                 if( is_null( $namespace ) ) {
 136                         // Don't override namespaces
 137                         $this->mTargetNamespace = null;
 138                 } elseif( $namespace >= 0 ) {
 139                         // FIXME: Check for validity
 140                         $this->mTargetNamespace = intval( $namespace );
 141                 } else {
 142                         return false;
 143                 }
 144         }
 145
 146         /**
 147          * Default per-revision callback, performs the import.
 148          * @param $revision WikiRevision
 149          */
 150         public function importRevision( $revision ) {
 151                 $dbw = wfGetDB( DB_MASTER );
 152                 return $dbw->deadlockLoop( array( $revision, 'importOldRevision' ) );
 153         }
 154
 155         /**
 156          * Default per-revision callback, performs the import.
 157          * @param $rev WikiRevision
 158          */
 159         public function importLogItem( $rev ) {
 160                 $dbw = wfGetDB( DB_MASTER );
 161                 return $dbw->deadlockLoop( array( $rev, 'importLogItem' ) );
 162         }
 163
 164         /**
 165          * Dummy for now...
 166          */
 167         public function importUpload( $revision ) {
 168                 //$dbw = wfGetDB( DB_MASTER );
 169                 //return $dbw->deadlockLoop( array( $revision, 'importUpload' ) );
 170                 return false;
 171         }
 172
 173         /**
 174          * Mostly for hook use
 175          */
 176         public function finishImportPage( $title, $origTitle, $revCount, $sRevCount, $pageInfo ) {
 177                 $args = func_get_args();
 178                 return wfRunHooks( 'AfterImportPage', $args );
 179         }
 180
 181         /**
 182          * Alternate per-revision callback, for debugging.
 183          * @param $revision WikiRevision
 184          */
 185         public function debugRevisionHandler( &$revision ) {
 186                 $this->debug( "Got revision:" );
 187                 if( is_object( $revision->title ) ) {
 188                         $this->debug( "-- Title: " . $revision->title->getPrefixedText() );
 189                 } else {
 190                         $this->debug( "-- Title: <invalid>" );
 191                 }
 192                 $this->debug( "-- User: " . $revision->user_text );
 193                 $this->debug( "-- Timestamp: " . $revision->timestamp );
 194                 $this->debug( "-- Comment: " . $revision->comment );
 195                 $this->debug( "-- Text: " . $revision->text );
 196         }
 197
 198         /**
 199          * Notify the callback function when a new <page> is reached.
 200          * @param $title Title
 201          */
 202         function pageCallback( $title ) {
 203                 if( isset( $this->mPageCallback ) ) {
 204                         call_user_func( $this->mPageCallback, $title );
 205                 }
 206         }
 207
 208         /**
 209          * Notify the callback function when a </page> is closed.
 210          * @param $title Title
 211          * @param $origTitle Title
 212          * @param $revCount Integer
 213          * @param $sucCount Int: number of revisions for which callback returned true
 214          * @param $pageInfo Array: associative array of page information
 215          */
 216         private function pageOutCallback( $title, $origTitle, $revCount, $sucCount, $pageInfo ) {
 217                 if( isset( $this->mPageOutCallback ) ) {
 218                         $args = func_get_args();
 219                         call_user_func_array( $this->mPageOutCallback, $args );
 220                 }
 221         }
 222
 223         /**
 224          * Notify the callback function of a revision
 225          * @param $revision A WikiRevision object
 226          */
 227         private function revisionCallback( $revision ) {
 228                 if ( isset( $this->mRevisionCallback ) ) {
 229                         return call_user_func_array( $this->mRevisionCallback,
 230                                         array( $revision, $this ) );
 231                 } else {
 232                         return false;
 233                 }
 234         }
 235
 236         /**
 237          * Notify the callback function of a new log item
 238          * @param $revision A WikiRevision object
 239          */
 240         private function logItemCallback( $revision ) {
 241                 if ( isset( $this->mLogItemCallback ) ) {
 242                         return call_user_func_array( $this->mLogItemCallback,
 243                                         array( $revision, $this ) );
 244                 } else {
 245                         return false;
 246                 }
 247         }
 248
 249         /**
 250          * Shouldn't something like this be built-in to XMLReader?
 251          * Fetches text contents of the current element, assuming
 252          * no sub-elements or such scary things.
 253          * @return string
 254          * @access private
 255          */
 256         private function nodeContents() {
 257                 return $this->reader->nodeContents();
 258         }
 259
 260         # --------------
 261
 262         /** Left in for debugging */
 263         private function dumpElement() {
 264                 static $lookup = null;
 265                 if (!$lookup) {
 266                         $xmlReaderConstants = array(
 267                                 "NONE",
 268                                 "ELEMENT",
 269                                 "ATTRIBUTE",
 270                                 "TEXT",
 271                                 "CDATA",
 272                                 "ENTITY_REF",
 273                                 "ENTITY",
 274                                 "PI",
 275                                 "COMMENT",
 276                                 "DOC",
 277                                 "DOC_TYPE",
 278                                 "DOC_FRAGMENT",
 279                                 "NOTATION",
 280                                 "WHITESPACE",
 281                                 "SIGNIFICANT_WHITESPACE",
 282                                 "END_ELEMENT",
 283                                 "END_ENTITY",
 284                                 "XML_DECLARATION",
 285                                 );
 286                         $lookup = array();
 287
 288                         foreach( $xmlReaderConstants as $name ) {
 289                                 $lookup[constant("XmlReader::$name")] = $name;
 290                         }
 291                 }
 292
 293                 print( var_dump(
 294                         $lookup[$this->reader->nodeType],
 295                         $this->reader->name,
 296                         $this->reader->value
 297                 )."\n\n" );
 298         }
 299
 300         /**
 301          * Primary entry point
 302          */
 303         public function doImport() {
 304                 $this->reader->read();
 305
 306                 if ( $this->reader->name != 'mediawiki' ) {
 307                         throw new MWException( "Expected <mediawiki> tag, got ".
 308                                 $this->reader->name );
 309                 }
 310                 $this->debug( "<mediawiki> tag is correct." );
 311
 312                 $this->debug( "Starting primary dump processing loop." );
 313
 314                 $keepReading = $this->reader->read();
 315                 $skip = false;
 316                 while ( $keepReading ) {
 317                         $tag = $this->reader->name;
 318                         $type = $this->reader->nodeType;
 319
 320                         if ( !wfRunHooks( 'ImportHandleToplevelXMLTag', $this->reader ) ) {
 321                                 // Do nothing
 322                         } elseif ( $tag == 'mediawiki' && $type == XmlReader::END_ELEMENT ) {
 323                                 break;
 324                         } elseif ( $tag == 'siteinfo' ) {
 325                                 $this->handleSiteInfo();
 326                         } elseif ( $tag == 'page' ) {
 327                                 $this->handlePage();
 328                         } elseif ( $tag == 'logitem' ) {
 329                                 $this->handleLogItem();
 330                         } elseif ( $tag != '#text' ) {
 331                                 $this->warn( "Unhandled top-level XML tag $tag" );
 332
 333                                 $skip = true;
 334                         }
 335
 336                         if ($skip) {
 337                                 $keepReading = $this->reader->next();
 338                                 $skip = false;
 339                                 $this->debug( "Skip" );
 340                         } else {
 341                                 $keepReading = $this->reader->read();
 342                         }
 343                 }
 344
 345                 return true;
 346         }
 347
 348         private function handleSiteInfo() {
 349                 // Site info is useful, but not actually used for dump imports.
 350                 // Includes a quick short-circuit to save performance.
 351                 if ( ! $this->mSiteInfoCallback ) {
 352                         $this->reader->next();
 353                         return true;
 354                 }
 355                 throw new MWException( "SiteInfo tag is not yet handled, do not set mSiteInfoCallback" );
 356         }
 357
 358         private function handleLogItem() {
 359                 $this->debug( "Enter log item handler." );
 360                 $logInfo = array();
 361
 362                 // Fields that can just be stuffed in the pageInfo object
 363                 $normalFields = array( 'id', 'comment', 'type', 'action', 'timestamp',
 364                                         'logtitle', 'params' );
 365
 366                 while ( $this->reader->read() ) {
 367                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 368                                         $this->reader->name == 'logitem') {
 369                                 break;
 370                         }
 371
 372                         $tag = $this->reader->name;
 373
 374                         if ( !wfRunHooks( 'ImportHandleLogItemXMLTag',
 375                                                 $this->reader, $logInfo ) ) {
 376                                 // Do nothing
 377                         } elseif ( in_array( $tag, $normalFields ) ) {
 378                                 $logInfo[$tag] = $this->nodeContents();
 379                         } elseif ( $tag == 'contributor' ) {
 380                                 $logInfo['contributor'] = $this->handleContributor();
 381                         } elseif ( $tag != '#text' ) {
 382                                 $this->warn( "Unhandled log-item XML tag $tag" );
 383                         }
 384                 }
 385
 386                 $this->processLogItem( $logInfo );
 387         }
 388
 389         private function processLogItem( $logInfo ) {
 390                 $revision = new WikiRevision;
 391
 392                 $revision->setID( $logInfo['id'] );
 393                 $revision->setType( $logInfo['type'] );
 394                 $revision->setAction( $logInfo['action'] );
 395                 $revision->setTimestamp( $logInfo['timestamp'] );
 396                 $revision->setParams( $logInfo['params'] );
 397                 $revision->setTitle( Title::newFromText( $logInfo['logtitle'] ) );
 398
 399                 if ( isset( $logInfo['comment'] ) ) {
 400                         $revision->setComment( $logInfo['comment'] );
 401                 }
 402
 403                 if ( isset( $logInfo['contributor']['ip'] ) ) {
 404                         $revision->setUserIP( $logInfo['contributor']['ip'] );
 405                 }
 406                 if ( isset( $logInfo['contributor']['username'] ) ) {
 407                         $revision->setUserName( $logInfo['contributor']['username'] );
 408                 }
 409
 410                 return $this->logItemCallback( $revision );
 411         }
 412
 413         private function handlePage() {
 414                 // Handle page data.
 415                 $this->debug( "Enter page handler." );
 416                 $pageInfo = array( 'revisionCount' => 0, 'successfulRevisionCount' => 0 );
 417
 418                 // Fields that can just be stuffed in the pageInfo object
 419                 $normalFields = array( 'title', 'id', 'redirect', 'restrictions' );
 420
 421                 $skip = false;
 422                 $badTitle = false;
 423
 424                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 425                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 426                                         $this->reader->name == 'page') {
 427                                 break;
 428                         }
 429
 430                         $tag = $this->reader->name;
 431
 432                         if ( $badTitle ) {
 433                                 // The title is invalid, bail out of this page
 434                                 $skip = true;
 435                         } elseif ( !wfRunHooks( 'ImportHandlePageXMLTag', array( $this->reader,
 436                                                 &$pageInfo ) ) ) {
 437                                 // Do nothing
 438                         } elseif ( in_array( $tag, $normalFields ) ) {
 439                                 $pageInfo[$tag] = $this->nodeContents();
 440                                 if ( $tag == 'title' ) {
 441                                         $title = $this->processTitle( $pageInfo['title'] );
 442
 443                                         if ( !$title ) {
 444                                                 $badTitle = true;
 445                                                 $skip = true;
 446                                         }
 447
 448                                         $this->pageCallback( $title );
 449                                         list( $pageInfo['_title'], $origTitle ) = $title;
 450                                 }
 451                         } elseif ( $tag == 'revision' ) {
 452                                 $this->handleRevision( $pageInfo );
 453                         } elseif ( $tag == 'upload' ) {
 454                                 $this->handleUpload( $pageInfo );
 455                         } elseif ( $tag != '#text' ) {
 456                                 $this->warn( "Unhandled page XML tag $tag" );
 457                                 $skip = true;
 458                         }
 459                 }
 460
 461                 $this->pageOutCallback( $pageInfo['_title'], $origTitle,
 462                                         $pageInfo['revisionCount'],
 463                                         $pageInfo['successfulRevisionCount'],
 464                                         $pageInfo );
 465         }
 466
 467         private function handleRevision( &$pageInfo ) {
 468                 $this->debug( "Enter revision handler" );
 469                 $revisionInfo = array();
 470
 471                 $normalFields = array( 'id', 'timestamp', 'comment', 'minor', 'text' );
 472
 473                 $skip = false;
 474
 475                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 476                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 477                                         $this->reader->name == 'revision') {
 478                                 break;
 479                         }
 480
 481                         $tag = $this->reader->name;
 482
 483                         if ( !wfRunHooks( 'ImportHandleRevisionXMLTag', $this->reader,
 484                                                 $pageInfo, $revisionInfo ) ) {
 485                                 // Do nothing
 486                         } elseif ( in_array( $tag, $normalFields ) ) {
 487                                 $revisionInfo[$tag] = $this->nodeContents();
 488                         } elseif ( $tag == 'contributor' ) {
 489                                 $revisionInfo['contributor'] = $this->handleContributor();
 490                         } elseif ( $tag != '#text' ) {
 491                                 $this->warn( "Unhandled revision XML tag $tag" );
 492                                 $skip = true;
 493                         }
 494                 }
 495
 496                 $pageInfo['revisionCount']++;
 497                 if ( $this->processRevision( $pageInfo, $revisionInfo ) ) {
 498                         $pageInfo['successfulRevisionCount']++;
 499                 }
 500         }
 501
 502         private function processRevision( $pageInfo, $revisionInfo ) {
 503                 $revision = new WikiRevision;
 504
 505                 $revision->setID( $revisionInfo['id'] );
 506                 $revision->setText( $revisionInfo['text'] );
 507                 $revision->setTitle( $pageInfo['_title'] );
 508                 $revision->setTimestamp( $revisionInfo['timestamp'] );
 509
 510                 if ( isset( $revisionInfo['comment'] ) ) {
 511                         $revision->setComment( $revisionInfo['comment'] );
 512                 }
 513
 514                 if ( isset( $revisionInfo['minor'] ) )
 515                         $revision->setMinor( true );
 516
 517                 if ( isset( $revisionInfo['contributor']['ip'] ) ) {
 518                         $revision->setUserIP( $revisionInfo['contributor']['ip'] );
 519                 }
 520                 if ( isset( $revisionInfo['contributor']['username'] ) ) {
 521                         $revision->setUserName( $revisionInfo['contributor']['username'] );
 522                 }
 523
 524                 return $this->revisionCallback( $revision );
 525         }
 526
 527         private function handleUpload( &$pageInfo ) {
 528                 $this->debug( "Enter upload handler" );
 529                 $uploadInfo = array();
 530
 531                 $normalFields = array( 'timestamp', 'comment', 'filename', 'text',
 532                                         'src', 'size' );
 533
 534                 $skip = false;
 535
 536                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 537                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 538                                         $this->reader->name == 'upload') {
 539                                 break;
 540                         }
 541
 542                         $tag = $this->reader->name;
 543
 544                         if ( !wfRunHooks( 'ImportHandleUploadXMLTag', $this->reader,
 545                                                 $pageInfo, $revisionInfo ) ) {
 546                                 // Do nothing
 547                         } elseif ( in_array( $tag, $normalFields ) ) {
 548                                 $uploadInfo[$tag] = $this->nodeContents();
 549                         } elseif ( $tag == 'contributor' ) {
 550                                 $uploadInfo['contributor'] = $this->handleContributor();
 551                         } elseif ( $tag != '#text' ) {
 552                                 $this->warn( "Unhandled upload XML tag $tag" );
 553                                 $skip = true;
 554                         }
 555                 }
 556
 557                 return $this->processUpload( $pageInfo, $uploadInfo );
 558         }
 559
 560         private function processUpload( $pageInfo, $uploadInfo ) {
 561                 $revision = new WikiRevision;
 562
 563                 $revision->setTitle( $pageInfo['_title'] );
 564                 $revision->setID( $uploadInfo['id'] );
 565                 $revision->setTimestamp( $uploadInfo['timestamp'] );
 566                 $revision->setText( $uploadInfo['text'] );
 567                 $revision->setFilename( $uploadInfo['filename'] );
 568                 $revision->setSrc( $uploadInfo['src'] );
 569                 $revision->setSize( intval( $uploadInfo['size'] ) );
 570                 $revision->setComment( $uploadInfo['comment'] );
 571
 572                 if ( isset( $uploadInfo['contributor']['ip'] ) ) {
 573                         $revision->setUserIP( $revisionInfo['contributor']['ip'] );
 574                 }
 575                 if ( isset( $uploadInfo['contributor']['username'] ) ) {
 576                         $revision->setUserName( $revisionInfo['contributor']['username'] );
 577                 }
 578
 579                 return $this->uploadCallback( $revision );
 580         }
 581
 582         private function handleContributor() {
 583                 $fields = array( 'id', 'ip', 'username' );
 584                 $info = array();
 585
 586                 while ( $this->reader->read() ) {
 587                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 588                                         $this->reader->name == 'contributor') {
 589                                 break;
 590                         }
 591
 592                         $tag = $this->reader->name;
 593
 594                         if ( in_array( $tag, $fields ) ) {
 595                                 $info[$tag] = $this->nodeContents();
 596                         }
 597                 }
 598
 599                 return $info;
 600         }
 601
 602         private function processTitle( $text ) {
 603                 $workTitle = $text;
 604                 $origTitle = Title::newFromText( $workTitle );
 605                 $title = null;
 606
 607                 if( !is_null( $this->mTargetNamespace ) && !is_null( $origTitle ) ) {
 608                         $title = Title::makeTitle( $this->mTargetNamespace,
 609                                 $origTitle->getDBkey() );
 610                 } else {
 611                         $title = Title::newFromText( $workTitle );
 612                 }
 613
 614                 if( is_null( $title ) ) {
 615                         // Invalid page title? Ignore the page
 616                         $this->notice( "Skipping invalid page title '$workTitle'" );
 617                 } elseif( $title->getInterwiki() != '' ) {
 618                         $this->notice( "Skipping interwiki page title '$workTitle'" );
 619                         $title = null;
 620                 }
 621
 622                 return array( $origTitle, $title );
 623         }
 624 }
 625
 626 /** This is a horrible hack used to keep source compatibility */
 627 class UploadSourceAdapter {
 628         static $sourceRegistrations = array();
 629
 630         private $mSource;
 631         private $mBuffer;
 632         private $mPosition;
 633
 634         static function registerSource( $source ) {
 635                 $id = wfGenerateToken();
 636
 637                 self::$sourceRegistrations[$id] = $source;
 638
 639                 return $id;
 640         }
 641
 642         function stream_open( $path, $mode, $options, &$opened_path ) {
 643                 $url = parse_url($path);
 644                 $id = $url['host'];
 645
 646                 if ( !isset( self::$sourceRegistrations[$id] ) ) {
 647                         return false;
 648                 }
 649
 650                 $this->mSource = self::$sourceRegistrations[$id];
 651
 652                 return true;
 653         }
 654
 655         function stream_read( $count ) {
 656                 $return = '';
 657                 $leave = false;
 658
 659                 while ( !$leave && !$this->mSource->atEnd() &&
 660                                 strlen($this->mBuffer) < $count ) {
 661                         $read = $this->mSource->readChunk();
 662
 663                         if ( !strlen($read) ) {
 664                                 $leave = true;
 665                         }
 666
 667                         $this->mBuffer .= $read;
 668                 }
 669
 670                 if ( strlen($this->mBuffer) ) {
 671                         $return = substr( $this->mBuffer, 0, $count );
 672                         $this->mBuffer = substr( $this->mBuffer, $count );
 673                 }
 674
 675                 $this->mPosition += strlen($return);
 676
 677                 return $return;
 678         }
 679
 680         function stream_write( $data ) {
 681                 return false;
 682         }
 683
 684         function stream_tell() {
 685                 return $this->mPosition;
 686         }
 687
 688         function stream_eof() {
 689                 return $this->mSource->atEnd();
 690         }
 691
 692         function url_stat() {
 693                 $result = array();
 694
 695                 $result['dev'] = $result[0] = 0;
 696                 $result['ino'] = $result[1] = 0;
 697                 $result['mode'] = $result[2] = 0;
 698                 $result['nlink'] = $result[3] = 0;
 699                 $result['uid'] = $result[4] = 0;
 700                 $result['gid'] = $result[5] = 0;
 701                 $result['rdev'] = $result[6] = 0;
 702                 $result['size'] = $result[7] = 0;
 703                 $result['atime'] = $result[8] = 0;
 704                 $result['mtime'] = $result[9] = 0;
 705                 $result['ctime'] = $result[10] = 0;
 706                 $result['blksize'] = $result[11] = 0;
 707                 $result['blocks'] = $result[12] = 0;
 708
 709                 return $result;
 710         }
 711 }
 712
 713 class XMLReader2 extends XMLReader {
 714         function nodeContents() {
 715                 if( $this->isEmptyElement ) {
 716                         return "";
 717                 }
 718                 $buffer = "";
 719                 while( $this->read() ) {
 720                         switch( $this->nodeType ) {
 721                         case XmlReader::TEXT:
 722                         case XmlReader::SIGNIFICANT_WHITESPACE:
 723                                 $buffer .= $this->value;
 724                                 break;
 725                         case XmlReader::END_ELEMENT:
 726                                 return $buffer;
 727                         }
 728                 }
 729                 return $this->close();
 730         }
 731 }