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<?php/* vim: set expandtab tabstop=4 shiftwidth=4 foldmethod=marker: */// +----------------------------------------------------------------------+// | PHP Version 4 |// +----------------------------------------------------------------------+// | Copyright (c) 1997-2004 The PHP Group |// +----------------------------------------------------------------------+// | This source file is subject to version 2.02 of the PHP license, |// | that is bundled with this package in the file LICENSE, and is |// | available at through the world-wide-web at |// | http://www.php.net/license/2_02.txt. |// | If you did not receive a copy of the PHP license and are unable to |// | obtain it through the world-wide-web, please send a note to |// | license@php.net so we can mail you a copy immediately. |// +----------------------------------------------------------------------+// | Author: Stig Bakken <ssb@php.net> |// | Maintainer: Daniel Convissor <danielc@php.net> |// +----------------------------------------------------------------------+//// $Id$// XXX legend://// XXX ERRORMSG: The error message from the mysql function should// be registered here.//// TODO/wishlist:// longReadlen// binmoderequire_once 'DB/common.php';/*** Database independent query interface definition for PHP's MySQL* extension.** This is for MySQL versions 4.0 and below.** @package DB* @version $Id$* @category Database* @author Stig Bakken <ssb@php.net>*/class DB_mysql extends DB_common{// {{{ propertiesvar $connection;var $phptype, $dbsyntax;var $prepare_tokens = array();var $prepare_types = array();var $num_rows = array();var $transaction_opcount = 0;var $autocommit = true;var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */var $_db = false;// }}}// {{{ constructor/*** DB_mysql constructor.** @access public*/function DB_mysql(){$this->DB_common();$this->phptype = 'mysql';$this->dbsyntax = 'mysql';$this->features = array('prepare' => false,'pconnect' => true,'transactions' => true,'limit' => 'alter');$this->errorcode_map = array(1004 => DB_ERROR_CANNOT_CREATE,1005 => DB_ERROR_CANNOT_CREATE,1006 => DB_ERROR_CANNOT_CREATE,1007 => DB_ERROR_ALREADY_EXISTS,1008 => DB_ERROR_CANNOT_DROP,1022 => DB_ERROR_ALREADY_EXISTS,1046 => DB_ERROR_NODBSELECTED,1048 => DB_ERROR_CONSTRAINT,1050 => DB_ERROR_ALREADY_EXISTS,1051 => DB_ERROR_NOSUCHTABLE,1054 => DB_ERROR_NOSUCHFIELD,1062 => DB_ERROR_ALREADY_EXISTS,1064 => DB_ERROR_SYNTAX,1100 => DB_ERROR_NOT_LOCKED,1136 => DB_ERROR_VALUE_COUNT_ON_ROW,1146 => DB_ERROR_NOSUCHTABLE,1216 => DB_ERROR_CONSTRAINT,1217 => DB_ERROR_CONSTRAINT,);}// }}}// {{{ connect()/*** Connect to a database and log in as the specified user.** @param $dsn the data source name (see DB::parseDSN for syntax)* @param $persistent (optional) whether the connection should* be persistent* @access public* @return int DB_OK on success, a DB error on failure*/function connect($dsninfo, $persistent = false){if (!DB::assertExtension('mysql')) {return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);}$this->dsn = $dsninfo;if ($dsninfo['protocol'] && $dsninfo['protocol'] == 'unix') {$dbhost = ':' . $dsninfo['socket'];} else {$dbhost = $dsninfo['hostspec'] ? $dsninfo['hostspec'] : 'localhost';if ($dsninfo['port']) {$dbhost .= ':' . $dsninfo['port'];}}$connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';if ($dbhost && $dsninfo['username'] && isset($dsninfo['password'])) {$conn = @$connect_function($dbhost, $dsninfo['username'],$dsninfo['password']);} elseif ($dbhost && $dsninfo['username']) {$conn = @$connect_function($dbhost, $dsninfo['username']);} elseif ($dbhost) {$conn = @$connect_function($dbhost);} else {$conn = false;}if (!$conn) {if (($err = @mysql_error()) != '') {return $this->raiseError(DB_ERROR_CONNECT_FAILED, null, null,null, $err);} elseif (empty($php_errormsg)) {return $this->raiseError(DB_ERROR_CONNECT_FAILED);} else {return $this->raiseError(DB_ERROR_CONNECT_FAILED, null, null,null, $php_errormsg);}}if ($dsninfo['database']) {if (!@mysql_select_db($dsninfo['database'], $conn)) {switch(mysql_errno($conn)) {case 1049:return $this->raiseError(DB_ERROR_NOSUCHDB, null, null,null, @mysql_error($conn));case 1044:return $this->raiseError(DB_ERROR_ACCESS_VIOLATION, null, null,null, @mysql_error($conn));default:return $this->raiseError(DB_ERROR, null, null,null, @mysql_error($conn));}}// fix to allow calls to different databases in the same script$this->_db = $dsninfo['database'];}$this->connection = $conn;return DB_OK;}// }}}// {{{ disconnect()/*** Log out and disconnect from the database.** @access public** @return bool true on success, false if not connected.*/function disconnect(){$ret = @mysql_close($this->connection);$this->connection = null;return $ret;}// }}}// {{{ simpleQuery()/*** Send a query to MySQL and return the results as a MySQL resource* identifier.** @param the SQL query** @access public** @return mixed returns a valid MySQL result for successful SELECT* queries, DB_OK for other successful queries. A DB error is* returned on failure.*/function simpleQuery($query){$ismanip = DB::isManip($query);$this->last_query = $query;$query = $this->modifyQuery($query);if ($this->_db) {if (!@mysql_select_db($this->_db, $this->connection)) {return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);}}if (!$this->autocommit && $ismanip) {if ($this->transaction_opcount == 0) {$result = @mysql_query('SET AUTOCOMMIT=0', $this->connection);$result = @mysql_query('BEGIN', $this->connection);if (!$result) {return $this->mysqlRaiseError();}}$this->transaction_opcount++;}$result = @mysql_query($query, $this->connection);if (!$result) {return $this->mysqlRaiseError();}if (is_resource($result)) {$numrows = $this->numrows($result);if (is_object($numrows)) {return $numrows;}$this->num_rows[(int)$result] = $numrows;return $result;}return DB_OK;}// }}}// {{{ nextResult()/*** Move the internal mysql result pointer to the next available result** This method has not been implemented yet.** @param a valid sql result resource** @access public** @return false*/function nextResult($result){return false;}// }}}// {{{ fetchInto()/*** Fetch a row and insert the data into an existing array.** Formating of the array and the data therein are configurable.* See DB_result::fetchInto() for more information.** @param resource $result query result identifier* @param array $arr (reference) array where data from the row* should be placed* @param int $fetchmode how the resulting array should be indexed* @param int $rownum the row number to fetch** @return mixed DB_OK on success, null when end of result set is* reached or on failure** @see DB_result::fetchInto()* @access private*/function fetchInto($result, &$arr, $fetchmode, $rownum=null){if ($rownum !== null) {if (!@mysql_data_seek($result, $rownum)) {return null;}}if ($fetchmode & DB_FETCHMODE_ASSOC) {$arr = @mysql_fetch_array($result, MYSQL_ASSOC);if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {$arr = array_change_key_case($arr, CASE_LOWER);}} else {$arr = @mysql_fetch_row($result);}if (!$arr) {// See: http://bugs.php.net/bug.php?id=22328// for why we can't check errors on fetchingreturn null;/*$errno = @mysql_errno($this->connection);if (!$errno) {return null;}return $this->mysqlRaiseError($errno);*/}if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {/** Even though this DBMS already trims output, we do this because* a field might have intentional whitespace at the end that* gets removed by DB_PORTABILITY_RTRIM under another driver.*/$this->_rtrimArrayValues($arr);}if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {$this->_convertNullArrayValuesToEmpty($arr);}return DB_OK;}// }}}// {{{ freeResult()/*** Free the internal resources associated with $result.** @param $result MySQL result identifier** @access public** @return bool true on success, false if $result is invalid*/function freeResult($result){unset($this->num_rows[(int)$result]);return @mysql_free_result($result);}// }}}// {{{ numCols()/*** Get the number of columns in a result set.** @param $result MySQL result identifier** @access public** @return int the number of columns per row in $result*/function numCols($result){$cols = @mysql_num_fields($result);if (!$cols) {return $this->mysqlRaiseError();}return $cols;}// }}}// {{{ numRows()/*** Get the number of rows in a result set.** @param $result MySQL result identifier** @access public** @return int the number of rows in $result*/function numRows($result){$rows = @mysql_num_rows($result);if ($rows === null) {return $this->mysqlRaiseError();}return $rows;}// }}}// {{{ autoCommit()/*** Enable/disable automatic commits*/function autoCommit($onoff = false){// XXX if $this->transaction_opcount > 0, we should probably// issue a warning here.$this->autocommit = $onoff ? true : false;return DB_OK;}// }}}// {{{ commit()/*** Commit the current transaction.*/function commit(){if ($this->transaction_opcount > 0) {if ($this->_db) {if (!@mysql_select_db($this->_db, $this->connection)) {return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);}}$result = @mysql_query('COMMIT', $this->connection);$result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->mysqlRaiseError();}}return DB_OK;}// }}}// {{{ rollback()/*** Roll back (undo) the current transaction.*/function rollback(){if ($this->transaction_opcount > 0) {if ($this->_db) {if (!@mysql_select_db($this->_db, $this->connection)) {return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);}}$result = @mysql_query('ROLLBACK', $this->connection);$result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->mysqlRaiseError();}}return DB_OK;}// }}}// {{{ affectedRows()/*** Gets the number of rows affected by the data manipulation* query. For other queries, this function returns 0.** @return number of rows affected by the last query*/function affectedRows(){if (DB::isManip($this->last_query)) {return @mysql_affected_rows($this->connection);} else {return 0;}}// }}}// {{{ errorNative()/*** Get the native error code of the last error (if any) that* occured on the current connection.** @access public** @return int native MySQL error code*/function errorNative(){return @mysql_errno($this->connection);}// }}}// {{{ nextId()/*** Returns the next free id in a sequence** @param string $seq_name name of the sequence* @param boolean $ondemand when true, the seqence is automatically* created if it does not exist** @return int the next id number in the sequence. DB_Error if problem.** @internal* @see DB_common::nextID()* @access public*/function nextId($seq_name, $ondemand = true){$seqname = $this->getSequenceName($seq_name);do {$repeat = 0;$this->pushErrorHandling(PEAR_ERROR_RETURN);$result = $this->query("UPDATE ${seqname} ".'SET id=LAST_INSERT_ID(id+1)');$this->popErrorHandling();if ($result === DB_OK) {/** COMMON CASE **/$id = @mysql_insert_id($this->connection);if ($id != 0) {return $id;}/** EMPTY SEQ TABLE **/// Sequence table must be empty for some reason, so fill it and return 1// Obtain a user-level lock$result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");if (DB::isError($result)) {return $this->raiseError($result);}if ($result == 0) {// Failed to get the lock, bail with a DB_ERROR_NOT_LOCKED errorreturn $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);}// add the default value$result = $this->query("REPLACE INTO ${seqname} (id) VALUES (0)");if (DB::isError($result)) {return $this->raiseError($result);}// Release the lock$result = $this->getOne("SELECT RELEASE_LOCK('${seqname}_lock')");if (DB::isError($result)) {return $this->raiseError($result);}// We know what the result will be, so no need to try againreturn 1;/** ONDEMAND TABLE CREATION **/} elseif ($ondemand && DB::isError($result) &&$result->getCode() == DB_ERROR_NOSUCHTABLE){$result = $this->createSequence($seq_name);if (DB::isError($result)) {return $this->raiseError($result);} else {$repeat = 1;}/** BACKWARDS COMPAT **/} elseif (DB::isError($result) &&$result->getCode() == DB_ERROR_ALREADY_EXISTS){// see _BCsequence() comment$result = $this->_BCsequence($seqname);if (DB::isError($result)) {return $this->raiseError($result);}$repeat = 1;}} while ($repeat);return $this->raiseError($result);}// }}}// {{{ createSequence()/*** Creates a new sequence** @param string $seq_name name of the new sequence** @return int DB_OK on success. A DB_Error object is returned if* problems arise.** @internal* @see DB_common::createSequence()* @access public*/function createSequence($seq_name){$seqname = $this->getSequenceName($seq_name);$res = $this->query("CREATE TABLE ${seqname} ".'(id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,'.' PRIMARY KEY(id))');if (DB::isError($res)) {return $res;}// insert yields value 1, nextId call will generate ID 2$res = $this->query("INSERT INTO ${seqname} (id) VALUES (0)");if (DB::isError($res)) {return $res;}// so reset to zeroreturn $this->query("UPDATE ${seqname} SET id = 0;");}// }}}// {{{ dropSequence()/*** Deletes a sequence** @param string $seq_name name of the sequence to be deleted** @return int DB_OK on success. DB_Error if problems.** @internal* @see DB_common::dropSequence()* @access public*/function dropSequence($seq_name){return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));}// }}}// {{{ _BCsequence()/*** Backwards compatibility with old sequence emulation implementation* (clean up the dupes)** @param string $seqname The sequence name to clean up* @return mixed DB_Error or true*/function _BCsequence($seqname){// Obtain a user-level lock... this will release any previous// application locks, but unlike LOCK TABLES, it does not abort// the current transaction and is much less frequently used.$result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");if (DB::isError($result)) {return $result;}if ($result == 0) {// Failed to get the lock, can't do the conversion, bail// with a DB_ERROR_NOT_LOCKED errorreturn $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);}$highest_id = $this->getOne("SELECT MAX(id) FROM ${seqname}");if (DB::isError($highest_id)) {return $highest_id;}// This should kill all rows except the highest// We should probably do something if $highest_id isn't// numeric, but I'm at a loss as how to handle that...$result = $this->query("DELETE FROM ${seqname} WHERE id <> $highest_id");if (DB::isError($result)) {return $result;}// If another thread has been waiting for this lock,// it will go thru the above procedure, but will have no// real effect$result = $this->getOne("SELECT RELEASE_LOCK('${seqname}_lock')");if (DB::isError($result)) {return $result;}return true;}// }}}// {{{ quoteIdentifier()/*** Quote a string so it can be safely used as a table or column name** Quoting style depends on which database driver is being used.** MySQL can't handle the backtick character (<kbd>`</kbd>) in* table or column names.** @param string $str identifier name to be quoted** @return string quoted identifier string** @since 1.6.0* @access public* @internal*/function quoteIdentifier($str){return '`' . $str . '`';}// }}}// {{{ quote()/*** @deprecated Deprecated in release 1.6.0* @internal*/function quote($str) {return $this->quoteSmart($str);}// }}}// {{{ escapeSimple()/*** Escape a string according to the current DBMS's standards** @param string $str the string to be escaped** @return string the escaped string** @internal*/function escapeSimple($str) {if (function_exists('mysql_real_escape_string')) {return @mysql_real_escape_string($str, $this->connection);} else {return @mysql_escape_string($str);}}// }}}// {{{ modifyQuery()function modifyQuery($query){if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) {// "DELETE FROM table" gives 0 affected rows in MySQL.// This little hack lets you know how many rows were deleted.if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/','DELETE FROM \1 WHERE 1=1', $query);}}return $query;}// }}}// {{{ modifyLimitQuery()function modifyLimitQuery($query, $from, $count, $params = array()){if (DB::isManip($query)) {return $query . " LIMIT $count";} else {return $query . " LIMIT $from, $count";}}// }}}// {{{ mysqlRaiseError()/*** Gather information about an error, then use that info to create a* DB error object and finally return that object.** @param integer $errno PEAR error number (usually a DB constant) if* manually raising an error* @return object DB error object* @see DB_common::errorCode()* @see DB_common::raiseError()*/function mysqlRaiseError($errno = null){if ($errno === null) {if ($this->options['portability'] & DB_PORTABILITY_ERRORS) {$this->errorcode_map[1022] = DB_ERROR_CONSTRAINT;$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT_NOT_NULL;$this->errorcode_map[1062] = DB_ERROR_CONSTRAINT;} else {// Doing this in case mode changes during runtime.$this->errorcode_map[1022] = DB_ERROR_ALREADY_EXISTS;$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT;$this->errorcode_map[1062] = DB_ERROR_ALREADY_EXISTS;}$errno = $this->errorCode(mysql_errno($this->connection));}return $this->raiseError($errno, null, null, null,@mysql_errno($this->connection) . ' ** ' .@mysql_error($this->connection));}// }}}// {{{ tableInfo()/*** Returns information about a table or a result set.** @param object|string $result DB_result object from a query or a* string containing the name of a table* @param int $mode a valid tableInfo mode* @return array an associative array with the information requested* or an error object if something is wrong* @access public* @internal* @see DB_common::tableInfo()*/function tableInfo($result, $mode = null) {if (isset($result->result)) {/** Probably received a result object.* Extract the result resource identifier.*/$id = $result->result;$got_string = false;} elseif (is_string($result)) {/** Probably received a table name.* Create a result resource identifier.*/$id = @mysql_list_fields($this->dsn['database'],$result, $this->connection);$got_string = true;} else {/** Probably received a result resource identifier.* Copy it.* Deprecated. Here for compatibility only.*/$id = $result;$got_string = false;}if (!is_resource($id)) {return $this->mysqlRaiseError(DB_ERROR_NEED_MORE_DATA);}if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {$case_func = 'strtolower';} else {$case_func = 'strval';}$count = @mysql_num_fields($id);// made this IF due to performance (one if is faster than $count if's)if (!$mode) {for ($i=0; $i<$count; $i++) {$res[$i]['table'] = $case_func(@mysql_field_table($id, $i));$res[$i]['name'] = $case_func(@mysql_field_name($id, $i));$res[$i]['type'] = @mysql_field_type($id, $i);$res[$i]['len'] = @mysql_field_len($id, $i);$res[$i]['flags'] = @mysql_field_flags($id, $i);}} else { // full$res['num_fields']= $count;for ($i=0; $i<$count; $i++) {$res[$i]['table'] = $case_func(@mysql_field_table($id, $i));$res[$i]['name'] = $case_func(@mysql_field_name($id, $i));$res[$i]['type'] = @mysql_field_type($id, $i);$res[$i]['len'] = @mysql_field_len($id, $i);$res[$i]['flags'] = @mysql_field_flags($id, $i);if ($mode & DB_TABLEINFO_ORDER) {$res['order'][$res[$i]['name']] = $i;}if ($mode & DB_TABLEINFO_ORDERTABLE) {$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;}}}// free the result only if we were called on a tableif ($got_string) {@mysql_free_result($id);}return $res;}// }}}// {{{ getSpecialQuery()/*** Returns the query needed to get some backend info* @param string $type What kind of info you want to retrieve* @return string The SQL query string*/function getSpecialQuery($type){switch ($type) {case 'tables':return 'SHOW TABLES';case 'views':return DB_ERROR_NOT_CAPABLE;case 'users':$sql = 'select distinct User from user';if ($this->dsn['database'] != 'mysql') {$dsn = $this->dsn;$dsn['database'] = 'mysql';if (DB::isError($db = DB::connect($dsn))) {return $db;}$sql = $db->getCol($sql);$db->disconnect();// XXX Fixme the mysql driver should take care of thisif (!@mysql_select_db($this->dsn['database'], $this->connection)) {return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);}}return $sql;case 'databases':return 'SHOW DATABASES';default:return null;}}// }}}}/** Local variables:* tab-width: 4* c-basic-offset: 4* End:*/?>