includes/ImportXMLReader.php

   1 <?php
   2 /**
   3  * XML file reader for the page data importer
   4  *
   5  * @file
   6  */
   7
   8 /**
   9  * implements Special:Import
  10  * @ingroup SpecialPage
  11  */
  12 class WikiImporter {
  13         private $reader = null;
  14         private $mLogItemCallback, $mUploadCallback, $mRevisionCallback, $mPageCallback;
  15         private $mSiteInfoCallback, $mTargetNamespace, $mPageOutCallback;
  16         private $mDebug;
  17
  18         /**
  19          * Creates an ImportXMLReader drawing from the source provided
  20         */
  21         function __construct( $source ) {
  22                 $this->reader = new XMLReader2();
  23
  24                 stream_wrapper_register( 'uploadsource', 'UploadSourceAdapter' );
  25                 $id = UploadSourceAdapter::registerSource( $source );
  26                 $this->reader->open( "uploadsource://$id" );
  27
  28                 // Default callbacks
  29                 $this->setRevisionCallback( array( $this, "importRevision" ) );
  30                 $this->setUploadCallback( array( $this, 'importUpload' ) );
  31                 $this->setLogItemCallback( array( $this, 'importLogItem' ) );
  32                 $this->setPageOutCallback( array( $this, 'finishImportPage' ) );
  33         }
  34
  35         private function throwXmlError( $err ) {
  36                 $this->debug( "FAILURE: $err" );
  37                 wfDebug( "WikiImporter XML error: $err\n" );
  38         }
  39
  40         private function debug( $data ) {
  41                 if( $this->mDebug ) {
  42                         wfDebug( "IMPORT: $data\n" );
  43                 }
  44         }
  45
  46         private function warn( $data ) {
  47                 wfDebug( "IMPORT: $data\n" );
  48         }
  49
  50         private function notice( $data ) {
  51                 global $wgCommandLineMode;
  52                 if( $wgCommandLineMode ) {
  53                         print "$data\n";
  54                 } else {
  55                         global $wgOut;
  56                         $wgOut->addHTML( "<li>" . htmlspecialchars( $data ) . "</li>\n" );
  57                 }
  58         }
  59
  60         /**
  61          * Set debug mode...
  62          */
  63         function setDebug( $debug ) {
  64                 $this->mDebug = $debug;
  65         }
  66
  67         /**
  68          * Sets the action to perform as each new page in the stream is reached.
  69          * @param $callback callback
  70          * @return callback
  71          */
  72         public function setPageCallback( $callback ) {
  73                 $previous = $this->mPageCallback;
  74                 $this->mPageCallback = $callback;
  75                 return $previous;
  76         }
  77
  78         /**
  79          * Sets the action to perform as each page in the stream is completed.
  80          * Callback accepts the page title (as a Title object), a second object
  81          * with the original title form (in case it's been overridden into a
  82          * local namespace), and a count of revisions.
  83          *
  84          * @param $callback callback
  85          * @return callback
  86          */
  87         public function setPageOutCallback( $callback ) {
  88                 $previous = $this->mPageOutCallback;
  89                 $this->mPageOutCallback = $callback;
  90                 return $previous;
  91         }
  92
  93         /**
  94          * Sets the action to perform as each page revision is reached.
  95          * @param $callback callback
  96          * @return callback
  97          */
  98         public function setRevisionCallback( $callback ) {
  99                 $previous = $this->mRevisionCallback;
 100                 $this->mRevisionCallback = $callback;
 101                 return $previous;
 102         }
 103
 104         /**
 105          * Sets the action to perform as each file upload version is reached.
 106          * @param $callback callback
 107          * @return callback
 108          */
 109         public function setUploadCallback( $callback ) {
 110                 $previous = $this->mUploadCallback;
 111                 $this->mUploadCallback = $callback;
 112                 return $previous;
 113         }
 114
 115         /**
 116          * Sets the action to perform as each log item reached.
 117          * @param $callback callback
 118          * @return callback
 119          */
 120         public function setLogItemCallback( $callback ) {
 121                 $previous = $this->mLogItemCallback;
 122                 $this->mLogItemCallback = $callback;
 123                 return $previous;
 124         }
 125
 126         /**
 127          * Sets the action to perform when site info is encountered
 128          * @param $callback callback
 129          * @return callback
 130          */
 131         public function setSiteInfoCallback( $callback ) {
 132                 $previous = $this->mSiteInfoCallback;
 133                 $this->mSiteInfoCallback = $callback;
 134                 return $previous;
 135         }
 136
 137         /**
 138          * Set a target namespace to override the defaults
 139          */
 140         public function setTargetNamespace( $namespace ) {
 141                 if( is_null( $namespace ) ) {
 142                         // Don't override namespaces
 143                         $this->mTargetNamespace = null;
 144                 } elseif( $namespace >= 0 ) {
 145                         // FIXME: Check for validity
 146                         $this->mTargetNamespace = intval( $namespace );
 147                 } else {
 148                         return false;
 149                 }
 150         }
 151
 152         /**
 153          * Default per-revision callback, performs the import.
 154          * @param $revision WikiRevision
 155          */
 156         public function importRevision( $revision ) {
 157                 $dbw = wfGetDB( DB_MASTER );
 158                 return $dbw->deadlockLoop( array( $revision, 'importOldRevision' ) );
 159         }
 160
 161         /**
 162          * Default per-revision callback, performs the import.
 163          * @param $rev WikiRevision
 164          */
 165         public function importLogItem( $rev ) {
 166                 $dbw = wfGetDB( DB_MASTER );
 167                 return $dbw->deadlockLoop( array( $rev, 'importLogItem' ) );
 168         }
 169
 170         /**
 171          * Dummy for now...
 172          */
 173         public function importUpload( $revision ) {
 174                 //$dbw = wfGetDB( DB_MASTER );
 175                 //return $dbw->deadlockLoop( array( $revision, 'importUpload' ) );
 176                 return false;
 177         }
 178
 179         /**
 180          * Mostly for hook use
 181          */
 182         public function finishImportPage( $title, $origTitle, $revCount, $sRevCount, $pageInfo ) {
 183                 $args = func_get_args();
 184                 return wfRunHooks( 'AfterImportPage', $args );
 185         }
 186
 187         /**
 188          * Alternate per-revision callback, for debugging.
 189          * @param $revision WikiRevision
 190          */
 191         public function debugRevisionHandler( &$revision ) {
 192                 $this->debug( "Got revision:" );
 193                 if( is_object( $revision->title ) ) {
 194                         $this->debug( "-- Title: " . $revision->title->getPrefixedText() );
 195                 } else {
 196                         $this->debug( "-- Title: <invalid>" );
 197                 }
 198                 $this->debug( "-- User: " . $revision->user_text );
 199                 $this->debug( "-- Timestamp: " . $revision->timestamp );
 200                 $this->debug( "-- Comment: " . $revision->comment );
 201                 $this->debug( "-- Text: " . $revision->text );
 202         }
 203
 204         /**
 205          * Notify the callback function when a new <page> is reached.
 206          * @param $title Title
 207          */
 208         function pageCallback( $title ) {
 209                 if( isset( $this->mPageCallback ) ) {
 210                         call_user_func( $this->mPageCallback, $title );
 211                 }
 212         }
 213
 214         /**
 215          * Notify the callback function when a </page> is closed.
 216          * @param $title Title
 217          * @param $origTitle Title
 218          * @param $revCount Integer
 219          * @param $sucCount Int: number of revisions for which callback returned true
 220          * @param $pageInfo Array: associative array of page information
 221          */
 222         private function pageOutCallback( $title, $origTitle, $revCount, $sucCount, $pageInfo ) {
 223                 if( isset( $this->mPageOutCallback ) ) {
 224                         $args = func_get_args();
 225                         call_user_func_array( $this->mPageOutCallback, $args );
 226                 }
 227         }
 228
 229         /**
 230          * Notify the callback function of a revision
 231          * @param $revision A WikiRevision object
 232          */
 233         private function revisionCallback( $revision ) {
 234                 if ( isset( $this->mRevisionCallback ) ) {
 235                         return call_user_func_array( $this->mRevisionCallback,
 236                                         array( $revision, $this ) );
 237                 } else {
 238                         return false;
 239                 }
 240         }
 241
 242         /**
 243          * Notify the callback function of a new log item
 244          * @param $revision A WikiRevision object
 245          */
 246         private function logItemCallback( $revision ) {
 247                 if ( isset( $this->mLogItemCallback ) ) {
 248                         return call_user_func_array( $this->mLogItemCallback,
 249                                         array( $revision, $this ) );
 250                 } else {
 251                         return false;
 252                 }
 253         }
 254
 255         /**
 256          * Shouldn't something like this be built-in to XMLReader?
 257          * Fetches text contents of the current element, assuming
 258          * no sub-elements or such scary things.
 259          * @return string
 260          * @access private
 261          */
 262         private function nodeContents() {
 263                 return $this->reader->nodeContents();
 264         }
 265
 266         # --------------
 267
 268         /** Left in for debugging */
 269         private function dumpElement() {
 270                 static $lookup = null;
 271                 if (!$lookup) {
 272                         $xmlReaderConstants = array(
 273                                 "NONE",
 274                                 "ELEMENT",
 275                                 "ATTRIBUTE",
 276                                 "TEXT",
 277                                 "CDATA",
 278                                 "ENTITY_REF",
 279                                 "ENTITY",
 280                                 "PI",
 281                                 "COMMENT",
 282                                 "DOC",
 283                                 "DOC_TYPE",
 284                                 "DOC_FRAGMENT",
 285                                 "NOTATION",
 286                                 "WHITESPACE",
 287                                 "SIGNIFICANT_WHITESPACE",
 288                                 "END_ELEMENT",
 289                                 "END_ENTITY",
 290                                 "XML_DECLARATION",
 291                                 );
 292                         $lookup = array();
 293
 294                         foreach( $xmlReaderConstants as $name ) {
 295                                 $lookup[constant("XmlReader::$name")] = $name;
 296                         }
 297                 }
 298
 299                 print( var_dump(
 300                         $lookup[$this->reader->nodeType],
 301                         $this->reader->name,
 302                         $this->reader->value
 303                 )."\n\n" );
 304         }
 305
 306         /**
 307          * Primary entry point
 308          */
 309         public function doImport() {
 310                 $this->reader->read();
 311
 312                 if ( $this->reader->name != 'mediawiki' ) {
 313                         throw new MWException( "Expected <mediawiki> tag, got ".
 314                                 $this->reader->name );
 315                 }
 316                 $this->debug( "<mediawiki> tag is correct." );
 317
 318                 $this->debug( "Starting primary dump processing loop." );
 319
 320                 $keepReading = $this->reader->read();
 321                 $skip = false;
 322                 while ( $keepReading ) {
 323                         $tag = $this->reader->name;
 324                         $type = $this->reader->nodeType;
 325
 326                         if ( !wfRunHooks( 'ImportHandleToplevelXMLTag', $this->reader ) ) {
 327                                 // Do nothing
 328                         } elseif ( $tag == 'mediawiki' && $type == XmlReader::END_ELEMENT ) {
 329                                 break;
 330                         } elseif ( $tag == 'siteinfo' ) {
 331                                 $this->handleSiteInfo();
 332                         } elseif ( $tag == 'page' ) {
 333                                 $this->handlePage();
 334                         } elseif ( $tag == 'logitem' ) {
 335                                 $this->handleLogItem();
 336                         } elseif ( $tag != '#text' ) {
 337                                 $this->warn( "Unhandled top-level XML tag $tag" );
 338
 339                                 $skip = true;
 340                         }
 341
 342                         if ($skip) {
 343                                 $keepReading = $this->reader->next();
 344                                 $skip = false;
 345                                 $this->debug( "Skip" );
 346                         } else {
 347                                 $keepReading = $this->reader->read();
 348                         }
 349                 }
 350
 351                 return true;
 352         }
 353
 354         private function handleSiteInfo() {
 355                 // Site info is useful, but not actually used for dump imports.
 356                 // Includes a quick short-circuit to save performance.
 357                 if ( ! $this->mSiteInfoCallback ) {
 358                         $this->reader->next();
 359                         return true;
 360                 }
 361                 throw new MWException( "SiteInfo tag is not yet handled, do not set mSiteInfoCallback" );
 362         }
 363
 364         private function handleLogItem() {
 365                 $this->debug( "Enter log item handler." );
 366                 $logInfo = array();
 367
 368                 // Fields that can just be stuffed in the pageInfo object
 369                 $normalFields = array( 'id', 'comment', 'type', 'action', 'timestamp',
 370                                         'logtitle', 'params' );
 371
 372                 while ( $this->reader->read() ) {
 373                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 374                                         $this->reader->name == 'logitem') {
 375                                 break;
 376                         }
 377
 378                         $tag = $this->reader->name;
 379
 380                         if ( !wfRunHooks( 'ImportHandleLogItemXMLTag',
 381                                                 $this->reader, $logInfo ) ) {
 382                                 // Do nothing
 383                         } elseif ( in_array( $tag, $normalFields ) ) {
 384                                 $logInfo[$tag] = $this->nodeContents();
 385                         } elseif ( $tag == 'contributor' ) {
 386                                 $logInfo['contributor'] = $this->handleContributor();
 387                         } elseif ( $tag != '#text' ) {
 388                                 $this->warn( "Unhandled log-item XML tag $tag" );
 389                         }
 390                 }
 391
 392                 $this->processLogItem( $logInfo );
 393         }
 394
 395         private function processLogItem( $logInfo ) {
 396                 $revision = new WikiRevision;
 397
 398                 $revision->setID( $logInfo['id'] );
 399                 $revision->setType( $logInfo['type'] );
 400                 $revision->setAction( $logInfo['action'] );
 401                 $revision->setTimestamp( $logInfo['timestamp'] );
 402                 $revision->setParams( $logInfo['params'] );
 403                 $revision->setTitle( Title::newFromText( $logInfo['logtitle'] ) );
 404
 405                 if ( isset( $logInfo['comment'] ) ) {
 406                         $revision->setComment( $logInfo['comment'] );
 407                 }
 408
 409                 if ( isset( $logInfo['contributor']['ip'] ) ) {
 410                         $revision->setUserIP( $logInfo['contributor']['ip'] );
 411                 }
 412                 if ( isset( $logInfo['contributor']['username'] ) ) {
 413                         $revision->setUserName( $logInfo['contributor']['username'] );
 414                 }
 415
 416                 return $this->logItemCallback( $revision );
 417         }
 418
 419         private function handlePage() {
 420                 // Handle page data.
 421                 $this->debug( "Enter page handler." );
 422                 $pageInfo = array( 'revisionCount' => 0, 'successfulRevisionCount' => 0 );
 423
 424                 // Fields that can just be stuffed in the pageInfo object
 425                 $normalFields = array( 'title', 'id', 'redirect', 'restrictions' );
 426
 427                 $skip = false;
 428                 $badTitle = false;
 429
 430                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 431                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 432                                         $this->reader->name == 'page') {
 433                                 break;
 434                         }
 435
 436                         $tag = $this->reader->name;
 437
 438                         if ( $badTitle ) {
 439                                 // The title is invalid, bail out of this page
 440                                 $skip = true;
 441                         } elseif ( !wfRunHooks( 'ImportHandlePageXMLTag', array( $this->reader,
 442                                                 &$pageInfo ) ) ) {
 443                                 // Do nothing
 444                         } elseif ( in_array( $tag, $normalFields ) ) {
 445                                 $pageInfo[$tag] = $this->nodeContents();
 446                                 if ( $tag == 'title' ) {
 447                                         $title = $this->processTitle( $pageInfo['title'] );
 448
 449                                         if ( !$title ) {
 450                                                 $badTitle = true;
 451                                                 $skip = true;
 452                                         }
 453
 454                                         $this->pageCallback( $title );
 455                                         list( $pageInfo['_title'], $origTitle ) = $title;
 456                                 }
 457                         } elseif ( $tag == 'revision' ) {
 458                                 $this->handleRevision( $pageInfo );
 459                         } elseif ( $tag == 'upload' ) {
 460                                 $this->handleUpload( $pageInfo );
 461                         } elseif ( $tag != '#text' ) {
 462                                 $this->warn( "Unhandled page XML tag $tag" );
 463                                 $skip = true;
 464                         }
 465                 }
 466
 467                 $this->pageOutCallback( $pageInfo['_title'], $origTitle,
 468                                         $pageInfo['revisionCount'],
 469                                         $pageInfo['successfulRevisionCount'],
 470                                         $pageInfo );
 471         }
 472
 473         private function handleRevision( &$pageInfo ) {
 474                 $this->debug( "Enter revision handler" );
 475                 $revisionInfo = array();
 476
 477                 $normalFields = array( 'id', 'timestamp', 'comment', 'minor', 'text' );
 478
 479                 $skip = false;
 480
 481                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 482                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 483                                         $this->reader->name == 'revision') {
 484                                 break;
 485                         }
 486
 487                         $tag = $this->reader->name;
 488
 489                         if ( !wfRunHooks( 'ImportHandleRevisionXMLTag', $this->reader,
 490                                                 $pageInfo, $revisionInfo ) ) {
 491                                 // Do nothing
 492                         } elseif ( in_array( $tag, $normalFields ) ) {
 493                                 $revisionInfo[$tag] = $this->nodeContents();
 494                         } elseif ( $tag == 'contributor' ) {
 495                                 $revisionInfo['contributor'] = $this->handleContributor();
 496                         } elseif ( $tag != '#text' ) {
 497                                 $this->warn( "Unhandled revision XML tag $tag" );
 498                                 $skip = true;
 499                         }
 500                 }
 501
 502                 $pageInfo['revisionCount']++;
 503                 if ( $this->processRevision( $pageInfo, $revisionInfo ) ) {
 504                         $pageInfo['successfulRevisionCount']++;
 505                 }
 506         }
 507
 508         private function processRevision( $pageInfo, $revisionInfo ) {
 509                 $revision = new WikiRevision;
 510
 511                 $revision->setID( $revisionInfo['id'] );
 512                 $revision->setText( $revisionInfo['text'] );
 513                 $revision->setTitle( $pageInfo['_title'] );
 514                 $revision->setTimestamp( $revisionInfo['timestamp'] );
 515
 516                 if ( isset( $revisionInfo['comment'] ) ) {
 517                         $revision->setComment( $revisionInfo['comment'] );
 518                 }
 519
 520                 if ( isset( $revisionInfo['minor'] ) )
 521                         $revision->setMinor( true );
 522
 523                 if ( isset( $revisionInfo['contributor']['ip'] ) ) {
 524                         $revision->setUserIP( $revisionInfo['contributor']['ip'] );
 525                 }
 526                 if ( isset( $revisionInfo['contributor']['username'] ) ) {
 527                         $revision->setUserName( $revisionInfo['contributor']['username'] );
 528                 }
 529
 530                 return $this->revisionCallback( $revision );
 531         }
 532
 533         private function handleUpload( &$pageInfo ) {
 534                 $this->debug( "Enter upload handler" );
 535                 $uploadInfo = array();
 536
 537                 $normalFields = array( 'timestamp', 'comment', 'filename', 'text',
 538                                         'src', 'size' );
 539
 540                 $skip = false;
 541
 542                 while ( $skip ? $this->reader->next() : $this->reader->read() ) {
 543                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 544                                         $this->reader->name == 'upload') {
 545                                 break;
 546                         }
 547
 548                         $tag = $this->reader->name;
 549
 550                         if ( !wfRunHooks( 'ImportHandleUploadXMLTag', $this->reader,
 551                                                 $pageInfo, $revisionInfo ) ) {
 552                                 // Do nothing
 553                         } elseif ( in_array( $tag, $normalFields ) ) {
 554                                 $uploadInfo[$tag] = $this->nodeContents();
 555                         } elseif ( $tag == 'contributor' ) {
 556                                 $uploadInfo['contributor'] = $this->handleContributor();
 557                         } elseif ( $tag != '#text' ) {
 558                                 $this->warn( "Unhandled upload XML tag $tag" );
 559                                 $skip = true;
 560                         }
 561                 }
 562
 563                 return $this->processUpload( $pageInfo, $uploadInfo );
 564         }
 565
 566         private function processUpload( $pageInfo, $uploadInfo ) {
 567                 $revision = new WikiRevision;
 568
 569                 $revision->setTitle( $pageInfo['_title'] );
 570                 $revision->setID( $uploadInfo['id'] );
 571                 $revision->setTimestamp( $uploadInfo['timestamp'] );
 572                 $revision->setText( $uploadInfo['text'] );
 573                 $revision->setFilename( $uploadInfo['filename'] );
 574                 $revision->setSrc( $uploadInfo['src'] );
 575                 $revision->setSize( intval( $uploadInfo['size'] ) );
 576                 $revision->setComment( $uploadInfo['comment'] );
 577
 578                 if ( isset( $uploadInfo['contributor']['ip'] ) ) {
 579                         $revision->setUserIP( $revisionInfo['contributor']['ip'] );
 580                 }
 581                 if ( isset( $uploadInfo['contributor']['username'] ) ) {
 582                         $revision->setUserName( $revisionInfo['contributor']['username'] );
 583                 }
 584
 585                 return $this->uploadCallback( $revision );
 586         }
 587
 588         private function handleContributor() {
 589                 $fields = array( 'id', 'ip', 'username' );
 590                 $info = array();
 591
 592                 while ( $this->reader->read() ) {
 593                         if ( $this->reader->nodeType == XmlReader::END_ELEMENT &&
 594                                         $this->reader->name == 'contributor') {
 595                                 break;
 596                         }
 597
 598                         $tag = $this->reader->name;
 599
 600                         if ( in_array( $tag, $fields ) ) {
 601                                 $info[$tag] = $this->nodeContents();
 602                         }
 603                 }
 604
 605                 return $info;
 606         }
 607
 608         private function processTitle( $text ) {
 609                 $workTitle = $text;
 610                 $origTitle = Title::newFromText( $workTitle );
 611                 $title = null;
 612
 613                 if( !is_null( $this->mTargetNamespace ) && !is_null( $origTitle ) ) {
 614                         $title = Title::makeTitle( $this->mTargetNamespace,
 615                                 $origTitle->getDBkey() );
 616                 } else {
 617                         $title = Title::newFromText( $workTitle );
 618                 }
 619
 620                 if( is_null( $title ) ) {
 621                         // Invalid page title? Ignore the page
 622                         $this->notice( "Skipping invalid page title '$workTitle'" );
 623                 } elseif( $title->getInterwiki() != '' ) {
 624                         $this->notice( "Skipping interwiki page title '$workTitle'" );
 625                         $title = null;
 626                 }
 627
 628                 return array( $origTitle, $title );
 629         }
 630 }
 631
 632 /** This is a horrible hack used to keep source compatibility */
 633 class UploadSourceAdapter {
 634         static $sourceRegistrations = array();
 635
 636         private $mSource;
 637         private $mBuffer;
 638         private $mPosition;
 639
 640         static function registerSource( $source ) {
 641                 $id = wfGenerateToken();
 642
 643                 self::$sourceRegistrations[$id] = $source;
 644
 645                 return $id;
 646         }
 647
 648         function stream_open( $path, $mode, $options, &$opened_path ) {
 649                 $url = parse_url($path);
 650                 $id = $url['host'];
 651
 652                 if ( !isset( self::$sourceRegistrations[$id] ) ) {
 653                         return false;
 654                 }
 655
 656                 $this->mSource = self::$sourceRegistrations[$id];
 657
 658                 return true;
 659         }
 660
 661         function stream_read( $count ) {
 662                 $return = '';
 663                 $leave = false;
 664
 665                 while ( !$leave && !$this->mSource->atEnd() &&
 666                                 strlen($this->mBuffer) < $count ) {
 667                         $read = $this->mSource->readChunk();
 668
 669                         if ( !strlen($read) ) {
 670                                 $leave = true;
 671                         }
 672
 673                         $this->mBuffer .= $read;
 674                 }
 675
 676                 if ( strlen($this->mBuffer) ) {
 677                         $return = substr( $this->mBuffer, 0, $count );
 678                         $this->mBuffer = substr( $this->mBuffer, $count );
 679                 }
 680
 681                 $this->mPosition += strlen($return);
 682
 683                 return $return;
 684         }
 685
 686         function stream_write( $data ) {
 687                 return false;
 688         }
 689
 690         function stream_tell() {
 691                 return $this->mPosition;
 692         }
 693
 694         function stream_eof() {
 695                 return $this->mSource->atEnd();
 696         }
 697
 698         function url_stat() {
 699                 $result = array();
 700
 701                 $result['dev'] = $result[0] = 0;
 702                 $result['ino'] = $result[1] = 0;
 703                 $result['mode'] = $result[2] = 0;
 704                 $result['nlink'] = $result[3] = 0;
 705                 $result['uid'] = $result[4] = 0;
 706                 $result['gid'] = $result[5] = 0;
 707                 $result['rdev'] = $result[6] = 0;
 708                 $result['size'] = $result[7] = 0;
 709                 $result['atime'] = $result[8] = 0;
 710                 $result['mtime'] = $result[9] = 0;
 711                 $result['ctime'] = $result[10] = 0;
 712                 $result['blksize'] = $result[11] = 0;
 713                 $result['blocks'] = $result[12] = 0;
 714
 715                 return $result;
 716         }
 717 }
 718
 719 class XMLReader2 extends XMLReader {
 720         function nodeContents() {
 721                 if( $this->isEmptyElement ) {
 722                         return "";
 723                 }
 724                 $buffer = "";
 725                 while( $this->read() ) {
 726                         switch( $this->nodeType ) {
 727                         case XmlReader::TEXT:
 728                         case XmlReader::SIGNIFICANT_WHITESPACE:
 729                                 $buffer .= $this->value;
 730                                 break;
 731                         case XmlReader::END_ELEMENT:
 732                                 return $buffer;
 733                         }
 734                 }
 735                 return $this->close();
 736         }
 737 }