2 require_once( "FulltextStoplist.php" );
3 require_once( "CacheManager.php" );
5 define( "DB_READ", -1 );
6 define( "DB_WRITE", -2 );
7 define( "DB_LAST", -3 );
9 define( "LIST_COMMA", 0 );
10 define( "LIST_AND", 1 );
11 define( "LIST_SET", 2 );
15 #------------------------------------------------------------------------------
17 #------------------------------------------------------------------------------
18 /* private */ var $mLastQuery = "";
19 /* private */ var $mBufferResults = true;
20 /* private */ var $mIgnoreErrors = false;
22 /* private */ var $mServer, $mUser, $mPassword, $mConn, $mDBname;
23 /* private */ var $mOut, $mDebug, $mOpened = false;
25 /* private */ var $mFailFunction;
27 #------------------------------------------------------------------------------
29 #------------------------------------------------------------------------------
31 # These set a variable and return the previous state
33 # Fail function, takes a Database as a parameter
34 # Set to false for default, 1 for ignore errors
35 function setFailFunction( $function ) { return wfSetVar( $this->mFailFunction
, $function ); }
37 # Output page, used for reporting errors
38 # FALSE means discard output
39 function &setOutputPage( &$out ) { return wfSetRef( $this->mOut
, $out ); }
41 # Boolean, controls output of large amounts of debug information
42 function setDebug( $debug ) { return wfSetVar( $this->mDebug
, $debug ); }
44 # Turns buffering of SQL result sets on (true) or off (false). Default is
45 # "on" and it should not be changed without good reasons.
46 function setBufferResults( $buffer ) { return wfSetVar( $this->mBufferResults
, $buffer ); }
48 # Turns on (false) or off (true) the automatic generation and sending
49 # of a "we're sorry, but there has been a database error" page on
50 # database errors. Default is on (false). When turned off, the
51 # code should use wfLastErrno() and wfLastError() to handle the
52 # situation as appropriate.
53 function setIgnoreErrors( $ignoreErrors ) { return wfSetVar( $this->mIgnoreErrors
, $ignoreErrors ); }
57 function lastQuery() { return $this->mLastQuery
; }
58 function isOpen() { return $this->mOpened
; }
60 #------------------------------------------------------------------------------
62 #------------------------------------------------------------------------------
67 # Can't get a reference if it hasn't been set yet
68 if ( !isset( $wgOut ) ) {
71 $this->mOut
=& $wgOut;
75 /* static */ function newFromParams( $server, $user, $password, $dbName,
76 $failFunction = false, $debug = false, $bufferResults = true, $ignoreErrors = false )
79 $db->mFailFunction
= $failFunction;
80 $db->mIgnoreErrors
= $ignoreErrors;
82 $db->mBufferResults
= $bufferResults;
83 $db->open( $server, $user, $password, $dbName );
87 # Usually aborts on failure
88 # If the failFunction is set to a non-zero integer, returns success
89 function open( $server, $user, $password, $dbName )
91 global $wgEmergencyContact;
94 $this->mServer
= $server;
96 $this->mPassword
= $password;
97 $this->mDBname
= $dbName;
101 @$this->mConn
= mysql_connect( $server, $user, $password );
102 if ( $dbName != "" ) {
103 if ( $this->mConn
!== false ) {
104 $success = @mysql_select_db
( $dbName, $this->mConn
);
106 wfDebug( "Error selecting database \"$dbName\": " . $this->lastError() . "\n" );
109 wfDebug( "DB connection error\n" );
110 wfDebug( "Server: $server, User: $user, Password: " .
111 substr( $password, 0, 3 ) . "...\n" );
116 $success = !!$this->mConn
;
120 $this->reportConnectionError();
123 $this->mOpened
= $success;
127 # Closes a database connection, if it is open
128 # Returns success, true if already closed
131 $this->mOpened
= false;
132 if ( $this->mConn
) {
133 return mysql_close( $this->mConn
);
139 /* private */ function reportConnectionError( $msg = "")
141 if ( $this->mFailFunction
) {
142 if ( !is_int( $this->mFailFunction
) ) {
143 $this->$mFailFunction( $this );
146 wfEmergencyAbort( $this );
150 # Usually aborts on failure
151 # If errors are explicitly ignored, returns success
152 function query( $sql, $fname = "" )
156 if ( $wgProfiling ) {
157 # generalizeSQL will probably cut down the query to reasonable
158 # logging size most of the time. The substr is really just a sanity check.
159 $profName = "query: " . substr( Database
::generalizeSQL( $sql ), 0, 255 );
160 wfProfileIn( $profName );
163 $this->mLastQuery
= $sql;
165 if ( $this->mDebug
) {
166 $sqlx = substr( $sql, 0, 500 );
167 $sqlx = wordwrap(strtr($sqlx,"\t\n"," "));
168 wfDebug( "SQL: $sqlx\n" );
170 if( $this->mBufferResults
) {
171 $ret = mysql_query( $sql, $this->mConn
);
173 $ret = mysql_unbuffered_query( $sql, $this->mConn
);
176 if ( false === $ret ) {
177 $error = mysql_error( $this->mConn
);
178 $errno = mysql_errno( $this->mConn
);
179 if( $this->mIgnoreErrors
) {
180 wfDebug("SQL ERROR (ignored): " . $error . "\n");
182 wfDebug("SQL ERROR: " . $error . "\n");
184 // this calls wfAbruptExit()
185 $this->mOut
->databaseError( $fname, $sql, $error, $errno );
190 if ( $wgProfiling ) {
191 wfProfileOut( $profName );
196 function freeResult( $res ) {
197 if ( !@mysql_free_result
( $res ) ) {
198 wfDebugDieBacktrace( "Unable to free MySQL result\n" );
201 function fetchObject( $res ) {
202 @$row = mysql_fetch_object( $res );
203 # FIXME: HACK HACK HACK HACK debug
204 if( mysql_errno() ) {
205 wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( mysql_error() ) );
209 function numRows( $res ) {
210 @$n = mysql_num_rows( $res );
211 if( mysql_errno() ) {
212 wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( mysql_error() ) );
216 function numFields( $res ) { return mysql_num_fields( $res ); }
217 function fieldName( $res, $n ) { return mysql_field_name( $res, $n ); }
218 function insertId() { return mysql_insert_id( $this->mConn
); }
219 function dataSeek( $res, $row ) { return mysql_data_seek( $res, $row ); }
220 function lastErrno() { return mysql_errno(); }
221 function lastError() { return mysql_error(); }
222 function affectedRows() { return mysql_affected_rows( $this->mConn
); }
224 # Simple UPDATE wrapper
225 # Usually aborts on failure
226 # If errors are explicitly ignored, returns success
227 function set( $table, $var, $value, $cond, $fname = "Database::set" )
229 $sql = "UPDATE $table SET $var = '" .
230 wfStrencode( $value ) . "' WHERE ($cond)";
231 return !!$this->query( $sql, DB_WRITE
, $fname );
234 # Simple SELECT wrapper, returns a single field, input must be encoded
235 # Usually aborts on failure
236 # If errors are explicitly ignored, returns FALSE on failure
237 function get( $table, $var, $cond, $fname = "Database::get" )
239 $sql = "SELECT $var FROM $table WHERE ($cond)";
240 $result = $this->query( $sql, DB_READ
, $fname );
243 if ( mysql_num_rows( $result ) > 0 ) {
244 $s = mysql_fetch_object( $result );
246 mysql_free_result( $result );
251 # More complex SELECT wrapper, single row only
252 # Aborts or returns FALSE on error
253 # Takes an array of selected variables, and a condition map, which is ANDed
254 # e.g. getArray( "cur", array( "cur_id" ), array( "cur_namespace" => 0, "cur_title" => "Astronomy" ) )
255 # would return an object where $obj->cur_id is the ID of the Astronomy article
256 function getArray( $table, $vars, $conds, $fname = "Database::getArray" )
258 $vars = implode( ",", $vars );
259 $where = Database
::makeList( $conds, LIST_AND
);
260 $sql = "SELECT $vars FROM $table WHERE $where LIMIT 1";
261 $res = $this->query( $sql, $fname );
262 if ( $res === false ||
!$this->numRows( $res ) ) {
265 $obj = $this->fetchObject( $res );
266 $this->freeResult( $res );
270 # Removes most variables from an SQL query and replaces them with X or N for numbers.
271 # It's only slightly flawed. Don't use for anything important.
272 /* static */ function generalizeSQL( $sql )
274 # This does the same as the regexp below would do, but in such a way
275 # as to avoid crashing php on some large strings.
276 # $sql = preg_replace ( "/'([^\\\\']|\\\\.)*'|\"([^\\\\\"]|\\\\.)*\"/", "'X'", $sql);
278 $sql = str_replace ( "\\\\", "", $sql);
279 $sql = str_replace ( "\\'", "", $sql);
280 $sql = str_replace ( "\\\"", "", $sql);
281 $sql = preg_replace ("/'.*'/s", "'X'", $sql);
282 $sql = preg_replace ('/".*"/s', "'X'", $sql);
284 # All newlines, tabs, etc replaced by single space
285 $sql = preg_replace ( "/\s+/", " ", $sql);
288 $sql = preg_replace ('/-?[0-9]+/s', "N", $sql);
293 # Determines whether a field exists in a table
294 # Usually aborts on failure
295 # If errors are explicitly ignored, returns NULL on failure
296 function fieldExists( $table, $field, $fname = "Database::fieldExists" )
298 $res = $this->query( "DESCRIBE $table", DB_READ
, $fname );
305 while ( $row = $this->fetchObject( $res ) ) {
306 if ( $row->Field
== $field ) {
314 # Determines whether an index exists
315 # Usually aborts on failure
316 # If errors are explicitly ignored, returns NULL on failure
317 function indexExists( $table, $index, $fname = "Database::indexExists" )
319 # SHOW INDEX works in MySQL 3.23.58, but SHOW INDEXES does not.
320 # SHOW INDEX should work for 3.x and up:
321 # http://dev.mysql.com/doc/mysql/en/SHOW_INDEX.html
322 $sql = "SHOW INDEX FROM $table";
323 $res = $this->query( $sql, DB_READ
, $fname );
330 while ( $row = $this->fetchObject( $res ) ) {
331 if ( $row->Key_name
== $index ) {
339 function tableExists( $table )
341 $old = $this->mIgnoreErrors
;
342 $this->mIgnoreErrors
= true;
343 $res = $this->query( "SELECT 1 FROM $table LIMIT 1" );
344 $this->mIgnoreErrors
= $old;
346 $this->freeResult( $res );
353 function fieldInfo( $table, $field )
355 $res = $this->query( "SELECT * FROM $table LIMIT 1" );
356 $n = mysql_num_fields( $res );
357 for( $i = 0; $i < $n; $i++
) {
358 $meta = mysql_fetch_field( $res, $i );
359 if( $field == $meta->name
) {
366 # INSERT wrapper, inserts an array into a table
367 # Keys are field names, values are values
368 # Usually aborts on failure
369 # If errors are explicitly ignored, returns success
370 function insertArray( $table, $a, $fname = "Database::insertArray" )
372 $sql1 = "INSERT INTO $table (";
373 $sql2 = "VALUES (" . Database
::makeList( $a );
375 foreach ( $a as $field => $value ) {
382 $sql = "$sql1) $sql2)";
383 return !!$this->query( $sql, $fname );
386 # A cross between insertArray and getArray, takes a condition array and a SET array
387 function updateArray( $table, $values, $conds, $fname = "Database::updateArray" )
389 $sql = "UPDATE $table SET " . $this->makeList( $values, LIST_SET
);
390 $sql .= " WHERE " . $this->makeList( $conds, LIST_AND
);
391 $this->query( $sql, $fname );
394 # Makes a wfStrencoded list from an array
395 # $mode: LIST_COMMA - comma separated, no field names
396 # LIST_AND - ANDed WHERE clause (without the WHERE)
397 # LIST_SET - comma separated with field names, like a SET clause
398 /* static */ function makeList( $a, $mode = LIST_COMMA
)
402 foreach ( $a as $field => $value ) {
404 if ( $mode == LIST_AND
) {
412 if ( $mode == LIST_AND ||
$mode == LIST_SET
) {
415 if ( !is_numeric( $value ) ) {
416 $list .= "'" . wfStrencode( $value ) . "'";
424 function selectDB( $db )
426 $this->mDBname
= $db;
427 mysql_select_db( $db, $this->mConn
);
430 function startTimer( $timeout )
434 $tid = mysql_thread_id( $this->mConn
);
435 exec( "php $IP/killthread.php $timeout $tid &>/dev/null &" );
444 #------------------------------------------------------------------------------
446 #------------------------------------------------------------------------------
448 /* Standard fail function, called by default when a connection cannot be established
449 Displays the file cache if possible */
450 function wfEmergencyAbort( &$conn ) {
451 global $wgTitle, $wgUseFileCache, $title, $wgInputEncoding, $wgSiteNotice, $wgOutputEncoding;
453 header( "Content-type: text/html; charset=$wgOutputEncoding" );
454 $msg = $wgSiteNotice;
455 if($msg == "") $msg = wfMsgNoDB( "noconnect" );
458 if($wgUseFileCache) {
463 $t = Title
::newFromURL( $title );
464 } elseif (@$_REQUEST['search']) {
465 $search = $_REQUEST['search'];
466 echo wfMsgNoDB( "searchdisabled" );
467 echo wfMsgNoDB( "googlesearch", htmlspecialchars( $search ), $wgInputEncoding );
470 $t = Title
::newFromText( wfMsgNoDB( "mainpage" ) );
474 $cache = new CacheManager( $t );
475 if( $cache->isFileCached() ) {
476 $msg = "<p style='color: red'><b>$msg<br />\n" .
477 wfMsgNoDB( "cachederror" ) . "</b></p>\n";
479 $tag = "<div id='article'>";
483 $cache->fetchPageText() );
487 /* Don't cache error pages! They cause no end of trouble... */
488 header( "Cache-control: none" );
489 header( "Pragma: nocache" );
494 function wfStrencode( $s )
496 return addslashes( $s );
499 # Ideally we'd be using actual time fields in the db
500 function wfTimestamp2Unix( $ts ) {
501 return gmmktime( ( (int)substr( $ts, 8, 2) ),
502 (int)substr( $ts, 10, 2 ), (int)substr( $ts, 12, 2 ),
503 (int)substr( $ts, 4, 2 ), (int)substr( $ts, 6, 2 ),
504 (int)substr( $ts, 0, 4 ) );
507 function wfUnix2Timestamp( $unixtime ) {
508 return gmdate( "YmdHis", $unixtime );
511 function wfTimestampNow() {
513 return gmdate( "YmdHis" );
516 # Sorting hack for MySQL 3, which doesn't use index sorts for DESC
517 function wfInvertTimestamp( $ts ) {