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<?php/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: *//*** The PEAR DB driver for PHP's mssql extension* for interacting with Microsoft SQL Server databases** PHP versions 4 and 5** LICENSE: This source file is subject to version 3.0 of the PHP license* that is available through the world-wide-web at the following URI:* http://www.php.net/license/3_0.txt. If you did not receive a copy of* the PHP License and are unable to obtain it through the web, please* send a note to license@php.net so we can mail you a copy immediately.** @category Database* @package DB* @author Sterling Hughes <sterling@php.net>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2005 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version CVS: $Id: mssql.php,v 1.2 2005-09-20 17:01:22 ddelon Exp $* @link http://pear.php.net/package/DB*//*** Obtain the DB_common class so it can be extended from*/require_once 'DB/common.php';/*** The methods PEAR DB uses to interact with PHP's mssql extension* for interacting with Microsoft SQL Server databases** These methods overload the ones declared in DB_common.** @category Database* @package DB* @author Sterling Hughes <sterling@php.net>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2005 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version Release: @package_version@* @link http://pear.php.net/package/DB*/class DB_mssql extends DB_common{// {{{ properties/*** The DB driver type (mysql, oci8, odbc, etc.)* @var string*/var $phptype = 'mssql';/*** The database syntax variant to be used (db2, access, etc.), if any* @var string*/var $dbsyntax = 'mssql';/*** The capabilities of this DB implementation** The 'new_link' element contains the PHP version that first provided* new_link support for this DBMS. Contains false if it's unsupported.** Meaning of the 'limit' element:* + 'emulate' = emulate with fetch row by number* + 'alter' = alter the query* + false = skip rows** @var array*/var $features = array('limit' => 'emulate','new_link' => false,'numrows' => true,'pconnect' => true,'prepare' => false,'ssl' => false,'transactions' => true,);/*** A mapping of native error codes to DB error codes* @var array*/// XXX Add here error codes ie: 'S100E' => DB_ERROR_SYNTAXvar $errorcode_map = array(110 => DB_ERROR_VALUE_COUNT_ON_ROW,155 => DB_ERROR_NOSUCHFIELD,170 => DB_ERROR_SYNTAX,207 => DB_ERROR_NOSUCHFIELD,208 => DB_ERROR_NOSUCHTABLE,245 => DB_ERROR_INVALID_NUMBER,515 => DB_ERROR_CONSTRAINT_NOT_NULL,547 => DB_ERROR_CONSTRAINT,1913 => DB_ERROR_ALREADY_EXISTS,2627 => DB_ERROR_CONSTRAINT,2714 => DB_ERROR_ALREADY_EXISTS,3701 => DB_ERROR_NOSUCHTABLE,8134 => DB_ERROR_DIVZERO,);/*** The raw database connection created by PHP* @var resource*/var $connection;/*** The DSN information for connecting to a database* @var array*/var $dsn = array();/*** Should data manipulation queries be committed automatically?* @var bool* @access private*/var $autocommit = true;/*** The quantity of transactions begun** {@internal While this is private, it can't actually be designated* private in PHP 5 because it is directly accessed in the test suite.}}** @var integer* @access private*/var $transaction_opcount = 0;/*** The database specified in the DSN** It's a fix to allow calls to different databases in the same script.** @var string* @access private*/var $_db = null;// }}}// {{{ constructor/*** This constructor calls <kbd>$this->DB_common()</kbd>** @return void*/function DB_mssql(){$this->DB_common();}// }}}// {{{ connect()/*** Connect to the database server, log in and open the database** Don't call this method directly. Use DB::connect() instead.** @param array $dsn the data source name* @param bool $persistent should the connection be persistent?** @return int DB_OK on success. A DB_Error object on failure.*/function connect($dsn, $persistent = false){if (!PEAR::loadExtension('mssql') && !PEAR::loadExtension('sybase')&& !PEAR::loadExtension('sybase_ct')){return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);}$this->dsn = $dsn;if ($dsn['dbsyntax']) {$this->dbsyntax = $dsn['dbsyntax'];}$params = array($dsn['hostspec'] ? $dsn['hostspec'] : 'localhost',$dsn['username'] ? $dsn['username'] : null,$dsn['password'] ? $dsn['password'] : null,);if ($dsn['port']) {$params[0] .= ((substr(PHP_OS, 0, 3) == 'WIN') ? ',' : ':'). $dsn['port'];}$connect_function = $persistent ? 'mssql_pconnect' : 'mssql_connect';$this->connection = @call_user_func_array($connect_function, $params);if (!$this->connection) {return $this->raiseError(DB_ERROR_CONNECT_FAILED,null, null, null,@mssql_get_last_message());}if ($dsn['database']) {if (!@mssql_select_db($dsn['database'], $this->connection)) {return $this->raiseError(DB_ERROR_NODBSELECTED,null, null, null,@mssql_get_last_message());}$this->_db = $dsn['database'];}return DB_OK;}// }}}// {{{ disconnect()/*** Disconnects from the database server** @return bool TRUE on success, FALSE on failure*/function disconnect(){$ret = @mssql_close($this->connection);$this->connection = null;return $ret;}// }}}// {{{ simpleQuery()/*** Sends a query to the database server** @param string the SQL query string** @return mixed + a PHP result resrouce for successful SELECT queries* + the DB_OK constant for other successful queries* + a DB_Error object on failure*/function simpleQuery($query){$ismanip = DB::isManip($query);$this->last_query = $query;if (!@mssql_select_db($this->_db, $this->connection)) {return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED);}$query = $this->modifyQuery($query);if (!$this->autocommit && $ismanip) {if ($this->transaction_opcount == 0) {$result = @mssql_query('BEGIN TRAN', $this->connection);if (!$result) {return $this->mssqlRaiseError();}}$this->transaction_opcount++;}$result = @mssql_query($query, $this->connection);if (!$result) {return $this->mssqlRaiseError();}// Determine which queries that should return data, and which// should return an error code only.return $ismanip ? DB_OK : $result;}// }}}// {{{ nextResult()/*** Move the internal mssql result pointer to the next available result** @param a valid fbsql result resource** @access public** @return true if a result is available otherwise return false*/function nextResult($result){return @mssql_next_result($result);}// }}}// {{{ fetchInto()/*** Places a row from the result set into the given array** Formating of the array and the data therein are configurable.* See DB_result::fetchInto() for more information.** This method is not meant to be called directly. Use* DB_result::fetchInto() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result the query result resource* @param array $arr the referenced array to put the data in* @param int $fetchmode how the resulting array should be indexed* @param int $rownum the row number to fetch (0 = first row)** @return mixed DB_OK on success, NULL when the end of a result set is* reached or on failure** @see DB_result::fetchInto()*/function fetchInto($result, &$arr, $fetchmode, $rownum = null){if ($rownum !== null) {if (!@mssql_data_seek($result, $rownum)) {return null;}}if ($fetchmode & DB_FETCHMODE_ASSOC) {$arr = @mssql_fetch_array($result, MSSQL_ASSOC);if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {$arr = array_change_key_case($arr, CASE_LOWER);}} else {$arr = @mssql_fetch_row($result);}if (!$arr) {return null;}if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {$this->_rtrimArrayValues($arr);}if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {$this->_convertNullArrayValuesToEmpty($arr);}return DB_OK;}// }}}// {{{ freeResult()/*** Deletes the result set and frees the memory occupied by the result set** This method is not meant to be called directly. Use* DB_result::free() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return bool TRUE on success, FALSE if $result is invalid** @see DB_result::free()*/function freeResult($result){return @mssql_free_result($result);}// }}}// {{{ numCols()/*** Gets the number of columns in a result set** This method is not meant to be called directly. Use* DB_result::numCols() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return int the number of columns. A DB_Error object on failure.** @see DB_result::numCols()*/function numCols($result){$cols = @mssql_num_fields($result);if (!$cols) {return $this->mssqlRaiseError();}return $cols;}// }}}// {{{ numRows()/*** Gets the number of rows in a result set** This method is not meant to be called directly. Use* DB_result::numRows() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return int the number of rows. A DB_Error object on failure.** @see DB_result::numRows()*/function numRows($result){$rows = @mssql_num_rows($result);if ($rows === false) {return $this->mssqlRaiseError();}return $rows;}// }}}// {{{ autoCommit()/*** Enables or disables automatic commits** @param bool $onoff true turns it on, false turns it off** @return int DB_OK on success. A DB_Error object if the driver* doesn't support auto-committing transactions.*/function autoCommit($onoff = false){// XXX if $this->transaction_opcount > 0, we should probably// issue a warning here.$this->autocommit = $onoff ? true : false;return DB_OK;}// }}}// {{{ commit()/*** Commits the current transaction** @return int DB_OK on success. A DB_Error object on failure.*/function commit(){if ($this->transaction_opcount > 0) {if (!@mssql_select_db($this->_db, $this->connection)) {return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED);}$result = @mssql_query('COMMIT TRAN', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->mssqlRaiseError();}}return DB_OK;}// }}}// {{{ rollback()/*** Reverts the current transaction** @return int DB_OK on success. A DB_Error object on failure.*/function rollback(){if ($this->transaction_opcount > 0) {if (!@mssql_select_db($this->_db, $this->connection)) {return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED);}$result = @mssql_query('ROLLBACK TRAN', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->mssqlRaiseError();}}return DB_OK;}// }}}// {{{ affectedRows()/*** Determines the number of rows affected by a data maniuplation query** 0 is returned for queries that don't manipulate data.** @return int the number of rows. A DB_Error object on failure.*/function affectedRows(){if (DB::isManip($this->last_query)) {$res = @mssql_query('select @@rowcount', $this->connection);if (!$res) {return $this->mssqlRaiseError();}$ar = @mssql_fetch_row($res);if (!$ar) {$result = 0;} else {@mssql_free_result($res);$result = $ar[0];}} else {$result = 0;}return $result;}// }}}// {{{ nextId()/*** Returns the next free id in a sequence** @param string $seq_name name of the sequence* @param boolean $ondemand when true, the seqence is automatically* created if it does not exist** @return int the next id number in the sequence.* A DB_Error object on failure.** @see DB_common::nextID(), DB_common::getSequenceName(),* DB_mssql::createSequence(), DB_mssql::dropSequence()*/function nextId($seq_name, $ondemand = true){$seqname = $this->getSequenceName($seq_name);if (!@mssql_select_db($this->_db, $this->connection)) {return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED);}$repeat = 0;do {$this->pushErrorHandling(PEAR_ERROR_RETURN);$result = $this->query("INSERT INTO $seqname (vapor) VALUES (0)");$this->popErrorHandling();if ($ondemand && DB::isError($result) &&($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE)){$repeat = 1;$result = $this->createSequence($seq_name);if (DB::isError($result)) {return $this->raiseError($result);}} elseif (!DB::isError($result)) {$result =& $this->query("SELECT @@IDENTITY FROM $seqname");$repeat = 0;} else {$repeat = false;}} while ($repeat);if (DB::isError($result)) {return $this->raiseError($result);}$result = $result->fetchRow(DB_FETCHMODE_ORDERED);return $result[0];}/*** Creates a new sequence** @param string $seq_name name of the new sequence** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::createSequence(), DB_common::getSequenceName(),* DB_mssql::nextID(), DB_mssql::dropSequence()*/function createSequence($seq_name){return $this->query('CREATE TABLE '. $this->getSequenceName($seq_name). ' ([id] [int] IDENTITY (1, 1) NOT NULL,'. ' [vapor] [int] NULL)');}// }}}// {{{ dropSequence()/*** Deletes a sequence** @param string $seq_name name of the sequence to be deleted** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::dropSequence(), DB_common::getSequenceName(),* DB_mssql::nextID(), DB_mssql::createSequence()*/function dropSequence($seq_name){return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));}// }}}// {{{ quoteIdentifier()/*** Quotes a string so it can be safely used as a table or column name** @param string $str identifier name to be quoted** @return string quoted identifier string** @see DB_common::quoteIdentifier()* @since Method available since Release 1.6.0*/function quoteIdentifier($str){return '[' . str_replace(']', ']]', $str) . ']';}// }}}// {{{ mssqlRaiseError()/*** Produces a DB_Error object regarding the current problem** @param int $errno if the error is being manually raised pass a* DB_ERROR* constant here. If this isn't passed* the error information gathered from the DBMS.** @return object the DB_Error object** @see DB_common::raiseError(),* DB_mssql::errorNative(), DB_mssql::errorCode()*/function mssqlRaiseError($code = null){$message = @mssql_get_last_message();if (!$code) {$code = $this->errorNative();}return $this->raiseError($this->errorCode($code, $message),null, null, null, "$code - $message");}// }}}// {{{ errorNative()/*** Gets the DBMS' native error code produced by the last query** @return int the DBMS' error code*/function errorNative(){$res = @mssql_query('select @@ERROR as ErrorCode', $this->connection);if (!$res) {return DB_ERROR;}$row = @mssql_fetch_row($res);return $row[0];}// }}}// {{{ errorCode()/*** Determines PEAR::DB error code from mssql's native codes.** If <var>$nativecode</var> isn't known yet, it will be looked up.** @param mixed $nativecode mssql error code, if known* @return integer an error number from a DB error constant* @see errorNative()*/function errorCode($nativecode = null, $msg = ''){if (!$nativecode) {$nativecode = $this->errorNative();}if (isset($this->errorcode_map[$nativecode])) {if ($nativecode == 3701&& preg_match('/Cannot drop the index/i', $msg)){return DB_ERROR_NOT_FOUND;}return $this->errorcode_map[$nativecode];} else {return DB_ERROR;}}// }}}// {{{ tableInfo()/*** Returns information about a table or a result set** NOTE: only supports 'table' and 'flags' if <var>$result</var>* is a table name.** @param object|string $result DB_result object from a query or a* string containing the name of a table.* While this also accepts a query result* resource identifier, this behavior is* deprecated.* @param int $mode a valid tableInfo mode** @return array an associative array with the information requested.* A DB_Error object on failure.** @see DB_common::tableInfo()*/function tableInfo($result, $mode = null){if (is_string($result)) {/** Probably received a table name.* Create a result resource identifier.*/if (!@mssql_select_db($this->_db, $this->connection)) {return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED);}$id = @mssql_query("SELECT * FROM $result WHERE 1=0",$this->connection);$got_string = true;} elseif (isset($result->result)) {/** Probably received a result object.* Extract the result resource identifier.*/$id = $result->result;$got_string = false;} else {/** Probably received a result resource identifier.* Copy it.* Deprecated. Here for compatibility only.*/$id = $result;$got_string = false;}if (!is_resource($id)) {return $this->mssqlRaiseError(DB_ERROR_NEED_MORE_DATA);}if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {$case_func = 'strtolower';} else {$case_func = 'strval';}$count = @mssql_num_fields($id);$res = array();if ($mode) {$res['num_fields'] = $count;}for ($i = 0; $i < $count; $i++) {$res[$i] = array('table' => $got_string ? $case_func($result) : '','name' => $case_func(@mssql_field_name($id, $i)),'type' => @mssql_field_type($id, $i),'len' => @mssql_field_length($id, $i),// We only support flags for table'flags' => $got_string? $this->_mssql_field_flags($result,@mssql_field_name($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) {@mssql_free_result($id);}return $res;}// }}}// {{{ _mssql_field_flags()/*** Get a column's flags** Supports "not_null", "primary_key",* "auto_increment" (mssql identity), "timestamp" (mssql timestamp),* "unique_key" (mssql unique index, unique check or primary_key) and* "multiple_key" (multikey index)** mssql timestamp is NOT similar to the mysql timestamp so this is maybe* not useful at all - is the behaviour of mysql_field_flags that primary* keys are alway unique? is the interpretation of multiple_key correct?** @param string $table the table name* @param string $column the field name** @return string the flags** @access private* @author Joern Barthel <j_barthel@web.de>*/function _mssql_field_flags($table, $column){static $tableName = null;static $flags = array();if ($table != $tableName) {$flags = array();$tableName = $table;// get unique and primary keys$res = $this->getAll("EXEC SP_HELPINDEX[$table]", DB_FETCHMODE_ASSOC);foreach ($res as $val) {$keys = explode(', ', $val['index_keys']);if (sizeof($keys) > 1) {foreach ($keys as $key) {$this->_add_flag($flags[$key], 'multiple_key');}}if (strpos($val['index_description'], 'primary key')) {foreach ($keys as $key) {$this->_add_flag($flags[$key], 'primary_key');}} elseif (strpos($val['index_description'], 'unique')) {foreach ($keys as $key) {$this->_add_flag($flags[$key], 'unique_key');}}}// get auto_increment, not_null and timestamp$res = $this->getAll("EXEC SP_COLUMNS[$table]", DB_FETCHMODE_ASSOC);foreach ($res as $val) {$val = array_change_key_case($val, CASE_LOWER);if ($val['nullable'] == '0') {$this->_add_flag($flags[$val['column_name']], 'not_null');}if (strpos($val['type_name'], 'identity')) {$this->_add_flag($flags[$val['column_name']], 'auto_increment');}if (strpos($val['type_name'], 'timestamp')) {$this->_add_flag($flags[$val['column_name']], 'timestamp');}}}if (array_key_exists($column, $flags)) {return(implode(' ', $flags[$column]));}return '';}// }}}// {{{ _add_flag()/*** Adds a string to the flags array if the flag is not yet in there* - if there is no flag present the array is created** @param array &$array the reference to the flag-array* @param string $value the flag value** @return void** @access private* @author Joern Barthel <j_barthel@web.de>*/function _add_flag(&$array, $value){if (!is_array($array)) {$array = array($value);} elseif (!in_array($value, $array)) {array_push($array, $value);}}// }}}// {{{ getSpecialQuery()/*** Obtains the query string needed for listing a given type of objects** @param string $type the kind of objects you want to retrieve** @return string the SQL query string or null if the driver doesn't* support the object type requested** @access protected* @see DB_common::getListOf()*/function getSpecialQuery($type){switch ($type) {case 'tables':return "SELECT name FROM sysobjects WHERE type = 'U'". ' ORDER BY name';case 'views':return "SELECT name FROM sysobjects WHERE type = 'V'";default:return null;}}// }}}}/** Local variables:* tab-width: 4* c-basic-offset: 4* End:*/?>