includes/User.php

   1 <?php
   2 # See user.doc
   3
   4 include_once( "WatchedItem.php" );
   5
   6 class User {
   7         /* private */ var $mId, $mName, $mPassword, $mEmail, $mNewtalk;
   8         /* private */ var $mRights, $mOptions;
   9         /* private */ var $mDataLoaded, $mNewpassword;
  10         /* private */ var $mSkin;
  11         /* private */ var $mBlockedby, $mBlockreason;
  12         /* private */ var $mTouched;
  13         /* private */ var $mCookiePassword;
  14
  15         function User()
  16         {
  17                 $this->loadDefaults();
  18         }
  19
  20         # Static factory method
  21         #
  22         function newFromName( $name )
  23         {
  24                 $u = new User();
  25
  26                 # Clean up name according to title rules
  27
  28                 $t = Title::newFromText( $name );
  29                 $u->setName( $t->getText() );
  30                 return $u;
  31         }
  32
  33         /* static */ function whoIs( $id )
  34         {
  35                 return wfGetSQL( "user", "user_name", "user_id=$id" );
  36         }
  37
  38         /* static */ function idFromName( $name )
  39         {
  40                 $nt = Title::newFromText( $name );
  41                 $sql = "SELECT user_id FROM user WHERE user_name='" .
  42                   wfStrencode( $nt->getText() ) . "'";
  43                 $res = wfQuery( $sql, DB_READ, "User::idFromName" );
  44
  45                 if ( 0 == wfNumRows( $res ) ) { return 0; }
  46                 else {
  47                         $s = wfFetchObject( $res );
  48                         return $s->user_id;
  49                 }
  50         }
  51
  52         # does the string match an anonymous user IP address?
  53         /* static */ function isIP( $name ) {
  54                 return preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$name);
  55
  56         }
  57
  58         /* static */ function randomPassword()
  59         {
  60                 $pwchars = "ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz";
  61                 $l = strlen( $pwchars ) - 1;
  62
  63                 wfSeedRandom();
  64                 $np = $pwchars{mt_rand( 0, $l )} . $pwchars{mt_rand( 0, $l )} .
  65                   $pwchars{mt_rand( 0, $l )} . chr( mt_rand(48, 57) ) .
  66                   $pwchars{mt_rand( 0, $l )} . $pwchars{mt_rand( 0, $l )} .
  67                   $pwchars{mt_rand( 0, $l )};
  68                 return $np;
  69         }
  70
  71         function loadDefaults()
  72         {
  73                 global $wgLang, $wgIP;
  74                 global $wgNamespacesToBeSearchedDefault;
  75
  76                 $this->mId = $this->mNewtalk = 0;
  77                 $this->mName = $wgIP;
  78                 $this->mEmail = "";
  79                 $this->mPassword = $this->mNewpassword = "";
  80                 $this->mRights = array();
  81                 $defOpt = $wgLang->getDefaultUserOptions() ;
  82                 foreach ( $defOpt as $oname => $val ) {
  83                         $this->mOptions[$oname] = $val;
  84                 }
  85                 foreach ($wgNamespacesToBeSearchedDefault as $nsnum => $val) {
  86                         $this->mOptions["searchNs".$nsnum] = $val;
  87                 }
  88                 unset( $this->mSkin );
  89                 $this->mDataLoaded = false;
  90                 $this->mBlockedby = -1; # Unset
  91                 $this->mTouched = '0'; # Allow any pages to be cached
  92                 $this->cookiePassword = "";
  93         }
  94
  95         /* private */ function getBlockedStatus()
  96         {
  97                 global $wgIP, $wgBlockCache;
  98
  99                 if ( -1 != $this->mBlockedby ) { return; }
 100
 101                 $this->mBlockedby = 0;
 102
 103                 # User blocking
 104                 if ( $this->mId ) {
 105                         $block = new Block();
 106                         if ( $block->load( $wgIP , $this->mId ) ) {
 107                                 $this->mBlockedby = $block->mBy;
 108                                 $this->mBlockreason = $block->mReason;
 109                         }
 110                 }
 111
 112                 # IP/range blocking
 113                 if ( !$this->mBlockedby ) {
 114                         $block = $wgBlockCache->get( $wgIP );
 115                         if ( $block !== false ) {
 116                                 $this->mBlockedby = $block->mBy;
 117                                 $this->mBlockreason = $block->mReason;
 118                         }
 119                 }
 120         }
 121
 122         function isBlocked()
 123         {
 124                 $this->getBlockedStatus();
 125                 if ( 0 == $this->mBlockedby ) { return false; }
 126                 return true;
 127         }
 128
 129         function blockedBy() {
 130                 $this->getBlockedStatus();
 131                 return $this->mBlockedby;
 132         }
 133
 134         function blockedFor() {
 135                 $this->getBlockedStatus();
 136                 return $this->mBlockreason;
 137         }
 138
 139         function SetupSession() {
 140                 global $wgSessionsInMemcached, $wgCookiePath, $wgCookieDomain;
 141                 if( $wgSessionsInMemcached ) {
 142                         include_once( "MemcachedSessions.php" );
 143                 }
 144                 session_set_cookie_params( 0, $wgCookiePath, $wgCookieDomain );
 145                 session_cache_limiter( "private, must-revalidate" );
 146                 session_start();
 147         }
 148
 149         /* static */ function loadFromSession()
 150         {
 151                 global $wgMemc, $wgDBname;
 152
 153                 if ( isset( $_SESSION['wsUserID'] ) ) {
 154                         if ( 0 != $_SESSION['wsUserID'] ) {
 155                                 $sId = $_SESSION['wsUserID'];
 156                         } else {
 157                                 return new User();
 158                         }
 159                 } else if ( isset( $_COOKIE["{$wgDBname}UserID"] ) ) {
 160                         $sId = IntVal( $_COOKIE["{$wgDBname}UserID"] );
 161                         $_SESSION['wsUserID'] = $sId;
 162                 } else {
 163                         return new User();
 164                 }
 165                 if ( isset( $_SESSION['wsUserName'] ) ) {
 166                         $sName = $_SESSION['wsUserName'];
 167                 } else if ( isset( $HTTP_COOKIE_VARS["{$wgDBname}UserName"] ) ) {
 168                         $sName = $HTTP_COOKIE_VARS["{$wgDBname}UserName"];
 169                         $_SESSION['wsUserName'] = $sName;
 170                 } else {
 171                         return new User();
 172                 }
 173
 174                 $passwordCorrect = FALSE;
 175                 $user = $wgMemc->get( $key = "$wgDBname:user:id:$sId" );
 176                 if($makenew = !$user) {
 177                         wfDebug( "User::loadFromSession() unable to load from memcached\n" );
 178                         $user = new User();
 179                         $user->mId = $sId;
 180                         $user->loadFromDatabase();
 181                 } else {
 182                         wfDebug( "User::loadFromSession() got from cache!\n" );
 183                 }
 184
 185                 if ( isset( $_SESSION['wsUserPassword'] ) ) {
 186                         $passwordCorrect = $_SESSION['wsUserPassword'] == $user->mPassword;
 187                 } else if ( isset( $HTTP_COOKIE_VARS["{$wgDBname}Password"] ) ) {
 188                         $user->mCookiePassword = $HTTP_COOKIE_VARS["{$wgDBname}Password"];
 189                         $_SESSION['wsUserPassword'] = $user->addSalt( $user->mCookiePassword );
 190                         $passwordCorrect = $_SESSION['wsUserPassword'] == $user->mPassword;
 191                 } else {
 192                         return new User(); # Can't log in from session
 193                 }
 194
 195                 if ( ( $sName == $user->mName ) && $passwordCorrect ) {
 196                         if($makenew) {
 197                                 if($wgMemc->set( $key, $user ))
 198                                         wfDebug( "User::loadFromSession() successfully saved user\n" );
 199                                 else
 200                                         wfDebug( "User::loadFromSession() unable to save to memcached\n" );
 201                         }
 202                         $user->spreadBlock();
 203                         return $user;
 204                 }
 205                 return new User(); # Can't log in from session
 206         }
 207
 208         function loadFromDatabase()
 209         {
 210                 global $wgCommandLineMode;
 211                 if ( $this->mDataLoaded || $wgCommandLineMode ) {
 212                         return;
 213                 }
 214
 215                 # Paranoia
 216                 $this->mId = IntVal( $this->mId );
 217
 218                 # check in separate table if there are changes to the talk page
 219                 $this->mNewtalk=0; # reset talk page status
 220                 if($this->mId) {
 221                         $sql = "SELECT 1 FROM user_newtalk WHERE user_id={$this->mId}";
 222                         $res = wfQuery ($sql, DB_READ, "User::loadFromDatabase" );
 223
 224                         if (wfNumRows($res)>0) {
 225                                 $this->mNewtalk= 1;
 226                         }
 227                         wfFreeResult( $res );
 228                 } else {
 229                         # TEST THIS @@@
 230                         global $wgDBname, $wgMemc;
 231                         $key = "$wgDBname:newtalk:ip:{$this->mName}";
 232                         $newtalk = $wgMemc->get( $key );
 233                         if( ! is_integer( $newtalk ) ){
 234                                 $sql = "SELECT 1 FROM user_newtalk WHERE user_ip='{$this->mName}'";
 235                                 $res = wfQuery ($sql, DB_READ, "User::loadFromDatabase" );
 236
 237                                 $this->mNewtalk = (wfNumRows($res)>0) ? 1 : 0;
 238                                 wfFreeResult( $res );
 239
 240                                 $wgMemc->set( $key, $this->mNewtalk, time() ); // + 1800 );
 241                         } else {
 242                                 $this->mNewtalk = $newtalk ? 1 : 0;
 243                         }
 244                 }
 245                 if(!$this->mId) {
 246                         $this->mDataLoaded = true;
 247                         return;
 248                 } # the following stuff is for non-anonymous users only
 249
 250                 $sql = "SELECT user_name,user_password,user_newpassword,user_email," .
 251                   "user_options,user_rights,user_touched FROM user WHERE user_id=" .
 252                   "{$this->mId}";
 253                 $res = wfQuery( $sql, DB_READ, "User::loadFromDatabase" );
 254
 255                 if ( wfNumRows( $res ) > 0 ) {
 256                         $s = wfFetchObject( $res );
 257                         $this->mName = $s->user_name;
 258                         $this->mEmail = $s->user_email;
 259                         $this->mPassword = $s->user_password;
 260                         $this->mNewpassword = $s->user_newpassword;
 261                         $this->decodeOptions( $s->user_options );
 262                         $this->mRights = explode( ",", strtolower( $s->user_rights ) );
 263                         $this->mTouched = $s->user_touched;
 264                 }
 265
 266                 wfFreeResult( $res );
 267                 $this->mDataLoaded = true;
 268         }
 269
 270         function getID() { return $this->mId; }
 271         function setID( $v ) {
 272                 $this->mId = $v;
 273                 $this->mDataLoaded = false;
 274         }
 275
 276         function getName() {
 277                 $this->loadFromDatabase();
 278                 return $this->mName;
 279         }
 280
 281         function setName( $str )
 282         {
 283                 $this->loadFromDatabase();
 284                 $this->mName = $str;
 285         }
 286
 287         function getNewtalk()
 288         {
 289                 $this->loadFromDatabase();
 290                 return ( 0 != $this->mNewtalk );
 291         }
 292
 293         function setNewtalk( $val )
 294         {
 295                 $this->loadFromDatabase();
 296                 $this->mNewtalk = $val;
 297                 $this->invalidateCache();
 298         }
 299
 300         function invalidateCache() {
 301                 $this->loadFromDatabase();
 302                 $this->mTouched = wfTimestampNow();
 303                 # Don't forget to save the options after this or
 304                 # it won't take effect!
 305         }
 306
 307         function validateCache( $timestamp ) {
 308                 $this->loadFromDatabase();
 309                 return ($timestamp >= $this->mTouched);
 310         }
 311
 312         function getPassword()
 313         {
 314                 $this->loadFromDatabase();
 315                 return $this->mPassword;
 316         }
 317
 318         function getNewpassword()
 319         {
 320                 $this->loadFromDatabase();
 321                 return $this->mNewpassword;
 322         }
 323
 324         function addSalt( $p )
 325         {
 326                 global $wgPasswordSalt;
 327                 if($wgPasswordSalt)
 328                         return md5( "{$this->mId}-{$p}" );
 329                 else
 330                         return $p;
 331         }
 332
 333         function encryptPassword( $p )
 334         {
 335                 return $this->addSalt( md5( $p ) );
 336         }
 337
 338         function setPassword( $str )
 339         {
 340                 $this->loadFromDatabase();
 341                 $this->setCookiePassword( $str );
 342                 $this->mPassword = $this->encryptPassword( $str );
 343                 $this->mNewpassword = "";
 344         }
 345
 346         function setCookiePassword( $str )
 347         {
 348                 $this->loadFromDatabase();
 349                 $this->mCookiePassword = md5( $str );
 350         }
 351
 352         function setNewpassword( $str )
 353         {
 354                 $this->loadFromDatabase();
 355                 $this->mNewpassword = $this->encryptPassword( $str );
 356         }
 357
 358         function getEmail()
 359         {
 360                 $this->loadFromDatabase();
 361                 return $this->mEmail;
 362         }
 363
 364         function setEmail( $str )
 365         {
 366                 $this->loadFromDatabase();
 367                 $this->mEmail = $str;
 368         }
 369
 370         function getOption( $oname )
 371         {
 372                 $this->loadFromDatabase();
 373                 if ( array_key_exists( $oname, $this->mOptions ) ) {
 374                         return $this->mOptions[$oname];
 375                 } else {
 376                         return "";
 377                 }
 378         }
 379
 380         function setOption( $oname, $val )
 381         {
 382                 $this->loadFromDatabase();
 383                 $this->mOptions[$oname] = $val;
 384                 $this->invalidateCache();
 385         }
 386
 387         function getRights()
 388         {
 389                 $this->loadFromDatabase();
 390                 return $this->mRights;
 391         }
 392
 393         function addRight( $rname )
 394         {
 395                 $this->loadFromDatabase();
 396                 array_push( $this->mRights, $rname );
 397                 $this->invalidateCache();
 398         }
 399
 400         function isSysop()
 401         {
 402                 $this->loadFromDatabase();
 403                 if ( 0 == $this->mId ) { return false; }
 404
 405                 return in_array( "sysop", $this->mRights );
 406         }
 407
 408         function isDeveloper()
 409         {
 410                 $this->loadFromDatabase();
 411                 if ( 0 == $this->mId ) { return false; }
 412
 413                 return in_array( "developer", $this->mRights );
 414         }
 415
 416         function isBureaucrat()
 417         {
 418                 $this->loadFromDatabase();
 419                 if ( 0 == $this->mId ) { return false; }
 420
 421                 return in_array( "bureaucrat", $this->mRights );
 422         }
 423
 424         function isBot()
 425         {
 426                 $this->loadFromDatabase();
 427                 if ( 0 == $this->mId ) { return false; }
 428
 429                 return in_array( "bot", $this->mRights );
 430         }
 431
 432         function &getSkin()
 433         {
 434                 if ( ! isset( $this->mSkin ) ) {
 435                         $skinNames = Skin::getSkinNames();
 436                         $s = $this->getOption( "skin" );
 437                         if ( "" == $s ) { $s = 0; }
 438
 439                         if ( $s >= count( $skinNames ) ) { $sn = "SkinStandard"; }
 440                         else $sn = "Skin" . $skinNames[$s];
 441                         $this->mSkin = new $sn;
 442                 }
 443                 return $this->mSkin;
 444         }
 445
 446         function isWatched( $title ) {
 447                 $wl = WatchedItem::fromUserTitle( $this, $title );
 448                 return $wl->isWatched();
 449         }
 450
 451         function addWatch( $title ) {
 452                 $wl = WatchedItem::fromUserTitle( $this, $title );
 453                 $wl->addWatch();
 454                 $this->invalidateCache();
 455         }
 456
 457         function removeWatch( $title ) {
 458                 $wl = WatchedItem::fromUserTitle( $this, $title );
 459                 $wl->removeWatch();
 460                 $this->invalidateCache();
 461         }
 462
 463
 464         /* private */ function encodeOptions()
 465         {
 466                 $a = array();
 467                 foreach ( $this->mOptions as $oname => $oval ) {
 468                         array_push( $a, "{$oname}={$oval}" );
 469                 }
 470                 $s = implode( "\n", $a );
 471                 return wfStrencode( $s );
 472         }
 473
 474         /* private */ function decodeOptions( $str )
 475         {
 476                 $a = explode( "\n", $str );
 477                 foreach ( $a as $s ) {
 478                         if ( preg_match( "/^(.[^=]*)=(.*)$/", $s, $m ) ) {
 479                                 $this->mOptions[$m[1]] = $m[2];
 480                         }
 481                 }
 482         }
 483
 484         function setCookies()
 485         {
 486                 global $wgCookieExpiration, $wgCookiePath, $wgCookieDomain, $wgDBname;
 487                 if ( 0 == $this->mId ) return;
 488                 $this->loadFromDatabase();
 489                 $exp = time() + $wgCookieExpiration;
 490
 491                 $_SESSION['wsUserID'] = $this->mId;
 492                 setcookie( "{$wgDBname}UserID", $this->mId, $exp, $wgCookiePath, $wgCookieDomain );
 493
 494                 $_SESSION['wsUserName'] = $this->mName;
 495                 setcookie( "{$wgDBname}UserName", $this->mName, $exp, $wgCookiePath, $wgCookieDomain );
 496
 497                 $_SESSION['wsUserPassword'] = $this->mPassword;
 498                 if ( 1 == $this->getOption( "rememberpassword" ) ) {
 499                         setcookie( "{$wgDBname}Password", $this->mCookiePassword, $exp, $wgCookiePath, $wgCookieDomain );
 500                 } else {
 501                         setcookie( "{$wgDBname}Password", "", time() - 3600 );
 502                 }
 503         }
 504
 505         function logout()
 506         {
 507                 global $wgCookiePath, $wgCookieDomain, $wgDBname;
 508                 $this->mId = 0;
 509
 510                 $_SESSION['wsUserID'] = 0;
 511
 512                 setcookie( "{$wgDBname}UserID", "", time() - 3600, $wgCookiePath, $wgCookieDomain );
 513                 setcookie( "{$wgDBname}Password", "", time() - 3600, $wgCookiePath, $wgCookieDomain );
 514         }
 515
 516         function saveSettings()
 517         {
 518                 global $wgMemc, $wgDBname;
 519
 520                 if ( ! $this->mNewtalk ) {
 521                         if( $this->mId ) {
 522                                 $sql="DELETE FROM user_newtalk WHERE user_id={$this->mId}";
 523                                 wfQuery ($sql, DB_WRITE, "User::saveSettings");
 524                         } else {
 525                                 $sql="DELETE FROM user_newtalk WHERE user_ip='{$this->mName}'";
 526                                 wfQuery ($sql, DB_WRITE, "User::saveSettings");
 527                                 $wgMemc->delete( "$wgDBname:newtalk:ip:{$this->mName}" );
 528                         }
 529                 }
 530                 if ( 0 == $this->mId ) { return; }
 531
 532                 $sql = "UPDATE user SET " .
 533                   "user_name= '" . wfStrencode( $this->mName ) . "', " .
 534                   "user_password= '" . wfStrencode( $this->mPassword ) . "', " .
 535                   "user_newpassword= '" . wfStrencode( $this->mNewpassword ) . "', " .
 536                   "user_email= '" . wfStrencode( $this->mEmail ) . "', " .
 537                   "user_options= '" . $this->encodeOptions() . "', " .
 538                   "user_rights= '" . wfStrencode( implode( ",", $this->mRights ) ) . "', " .
 539                   "user_touched= '" . wfStrencode( $this->mTouched ) .
 540                   "' WHERE user_id={$this->mId}";
 541                 wfQuery( $sql, DB_WRITE, "User::saveSettings" );
 542                 $wgMemc->delete( "$wgDBname:user:id:$this->mId" );
 543         }
 544
 545         # Checks if a user with the given name exists
 546         #
 547         function idForName()
 548         {
 549                 $gotid = 0;
 550                 $s = trim( $this->mName );
 551                 if ( 0 == strcmp( "", $s ) ) return 0;
 552
 553                 $sql = "SELECT user_id FROM user WHERE user_name='" .
 554                   wfStrencode( $s ) . "'";
 555                 $res = wfQuery( $sql, DB_READ, "User::idForName" );
 556                 if ( 0 == wfNumRows( $res ) ) { return 0; }
 557
 558                 $s = wfFetchObject( $res );
 559                 if ( "" == $s ) return 0;
 560
 561                 $gotid = $s->user_id;
 562                 wfFreeResult( $res );
 563                 return $gotid;
 564         }
 565
 566         function addToDatabase()
 567         {
 568                 $sql = "INSERT INTO user (user_name,user_password,user_newpassword," .
 569                   "user_email, user_rights, user_options) " .
 570                   " VALUES ('" . wfStrencode( $this->mName ) . "', '" .
 571                   wfStrencode( $this->mPassword ) . "', '" .
 572                   wfStrencode( $this->mNewpassword ) . "', '" .
 573                   wfStrencode( $this->mEmail ) . "', '" .
 574                   wfStrencode( implode( ",", $this->mRights ) ) . "', '" .
 575                   $this->encodeOptions() . "')";
 576                 wfQuery( $sql, DB_WRITE, "User::addToDatabase" );
 577                 $this->mId = $this->idForName();
 578         }
 579
 580         function spreadBlock()
 581         {
 582                 global $wgIP;
 583                 # If the (non-anonymous) user is blocked, this function will block any IP address
 584                 # that they successfully log on from.
 585                 $fname = "User::spreadBlock";
 586
 587                 wfDebug( "User:spreadBlock()\n" );
 588                 if ( $this->mId == 0 ) {
 589                         return;
 590                 }
 591
 592                 $userblock = Block::newFromDB( "", $this->mId );
 593                 if ( !$userblock->isValid() ) {
 594                         return;
 595                 }
 596
 597                 # Check if this IP address is already blocked
 598                 $ipblock = Block::newFromDB( $wgIP );
 599                 if ( $ipblock->isValid() ) {
 600                         # Just update the timestamp
 601                         $ipblock->updateTimestamp();
 602                         return;
 603                 }
 604
 605                 # Make a new block object with the desired properties
 606                 wfDebug( "Autoblocking {$this->mUserName}@{$wgIP}\n" );
 607                 $ipblock->mAddress = $wgIP;
 608                 $ipblock->mUser = 0;
 609                 $ipblock->mBy = $userblock->mBy;
 610                 $ipblock->mReason = wfMsg( "autoblocker", $this->getName(), $userblock->mReason );
 611                 $ipblock->mTimestamp = wfTimestampNow();
 612                 $ipblock->mAuto = 1;
 613                 $ipblock->mExpiry = Block::getAutoblockExpiry( $ipblock->mTimestamp );
 614
 615                 # Insert it
 616                 $ipblock->insert();
 617
 618         }
 619
 620         function getPageRenderingHash(){
 621                 static $hash = false;
 622                 if( $hash ){
 623                         return $hash;
 624                 }
 625
 626                 // stubthreshold is only included below for completeness,
 627                 // it will always be 0 when this function is called by parsercache.
 628
 629                 $confstr =        $this->getOption( "quickbar" );
 630                 $confstr .= "!" . $this->getOption( "underline" );
 631                 $confstr .= "!" . $this->getOption( "hover" );
 632                 $confstr .= "!" . $this->getOption( "skin" );
 633                 $confstr .= "!" . $this->getOption( "math" );
 634                 $confstr .= "!" . $this->getOption( "highlightbroken" );
 635                 $confstr .= "!" . $this->getOption( "stubthreshold" );
 636                 $confstr .= "!" . $this->getOption( "editsection" );
 637                 $confstr .= "!" . $this->getOption( "editsectiononrightclick" );
 638                 $confstr .= "!" . $this->getOption( "showtoc" );
 639                 $confstr .= "!" . $this->getOption( "date" );
 640
 641                 if(strlen($confstr) > 32)
 642                         $hash = md5($confstr);
 643                 else
 644                         $hash = $confstr;
 645                 return $hash;
 646         }
 647
 648         function isAllowedToCreateAccount()
 649         {
 650                 global $wgWhitelistAccount;
 651                 $allowed = false;
 652
 653                 if (!$wgWhitelistAccount) { return 1; }; // default behaviour
 654                 foreach ($wgWhitelistAccount as $right => $ok) {
 655                         $userHasRight = (!strcmp($right, "user") || in_array($right, $this->getRights()));
 656                         $allowed |= ($ok && $userHasRight);
 657                 }
 658                 return $allowed;
 659         }
 660
 661
 662
 663 }
 664
 665 ?>