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- <?php
- //
- // +----------------------------------------------------------------------+
- // | PHP version 4.0 |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 1997-2001 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. |
- // +----------------------------------------------------------------------+
- // | Authors: Stig Bakken <ssb@fast.no> |
- // | |
- // +----------------------------------------------------------------------+
- //
- // Database independent query interface definition for PHP's MySQL
- // extension.
- //
-
- //
- // XXX legend:
- //
- // XXX ERRORMSG: The error message from the mysql function should
- // be registered here.
- //
-
- require_once "DB/common.php";
-
- class DB_mysql extends DB_common
- {
- // {{{ properties
-
- var $connection;
- var $phptype, $dbsyntax;
- var $prepare_tokens = array();
- var $prepare_types = array();
-
- // }}}
- // {{{ 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" => false
- );
- $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,
- 1046 => DB_ERROR_NODBSELECTED,
- 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,
- );
- }
-
- // }}}
-
- // {{{ connect()
-
- /**
- * Connect to a database and log in as the specified user.
- *
- * @param $dsn the data source name (see DB::parseDSN for syntax)
- * @param $persistent (optional) whether the connection should
- * be persistent
- * @access public
- * @return int DB_OK on success, a DB error on failure
- */
-
- function connect($dsn, $persistent = false)
- {
- if (is_array($dsn)) {
- $dsninfo = &$dsn;
- } else {
- $dsninfo = DB::parseDSN($dsn);
- }
-
- if (!$dsninfo || !$dsninfo["phptype"]) {
- return $this->raiseError(); // XXX ERRORMSG
- }
-
- $this->dsn = $dsninfo;
-
- $dbhost = $dsninfo["hostspec"] ? $dsninfo["hostspec"] : "localhost";
- $user = $dsninfo["username"];
- $pw = $dsninfo["password"];
-
- DB::assertExtension("mysql");
- $connect_function = $persistent ? "mysql_pconnect" : "mysql_connect";
-
- if ($dbhost && $user && $pw) {
- $conn = @$connect_function($dbhost, $user, $pw);
- } elseif ($dbhost && $user) {
- $conn = @$connect_function($dbhost, $user);
- } elseif ($dbhost) {
- $conn = @$connect_function($dbhost);
- } else {
- $conn = false;
- }
-
- if ($conn == false) {
- return $this->raiseError(); // XXX ERRORMSG
- }
-
- if ($dsninfo["database"]) {
- if (!mysql_select_db($dsninfo["database"], $conn)) {
- return $this->raiseError(); // XXX ERRORMSG
- }
- }
-
- $this->connection = $conn;
- return DB_OK;
- }
-
- // }}}
- // {{{ disconnect()
-
- /**
- * Log out and disconnect from the database.
- *
- * @access public
- *
- * @return bool TRUE on success, FALSE if not connected.
- */
- function disconnect()
- {
- return mysql_close($this->connection);
- }
-
- // }}}
- // {{{ 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)
- {
- $this->last_query = $query;
- $query = $this->modifyQuery($query);
- $result = mysql_query($query, $this->connection);
- if (!$result) {
- return $this->mysqlRaiseError();
- }
- // Determine which queries that should return data, and which
- // should return an error code only.
- return DB::isManip($query) ? DB_OK : $result;
- }
-
- // }}}
- // {{{ fetchRow()
-
- /**
- * Fetch a row and return as array.
- *
- * @param $result MySQL result identifier
- * @param $fetchmode how the resulting array should be indexed
- *
- * @access public
- *
- * @return mixed an array on success, a DB error on failure, NULL
- * if there is no more data
- */
- function &fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT)
- {
- if ($fetchmode == DB_FETCHMODE_DEFAULT) {
- $fetchmode = $this->fetchmode;
- }
-
- if ($fetchmode & DB_FETCHMODE_ASSOC) {
- $row = mysql_fetch_array($result, MYSQL_ASSOC);
- } else {
- $row = mysql_fetch_row($result);
- }
-
- if (!$row) {
- $errno = mysql_errno($this->connection);
-
- if (!$errno) {
- return null;
- }
-
- return $this->mysqlRaiseError($errno);
- }
-
- return $row;
- }
-
- // }}}
- // {{{ fetchInto()
-
- /**
- * Fetch a row and insert the data into an existing array.
- *
- * @param $result MySQL result identifier
- * @param $arr (reference) array where data from the row is stored
- * @param $fetchmode how the array data should be indexed
- *
- * @access public
- *
- * @return int DB_OK on success, a DB error on failure
- */
- function fetchInto($result, &$arr, $fetchmode = DB_FETCHMODE_DEFAULT)
- {
- if ($fetchmode == DB_FETCHMODE_DEFAULT) {
- $fetchmode = $this->fetchmode;
- }
-
- if ($fetchmode & DB_FETCHMODE_ASSOC) {
- $arr = mysql_fetch_array($result, MYSQL_ASSOC);
- } else {
- $arr = mysql_fetch_row($result);
- }
-
- if (!$arr) {
- $errno = mysql_errno($this->connection);
-
- if (!$errno) {
- return NULL;
- }
-
- return $this->mysqlRaiseError($errno);
- }
-
- return DB_OK;
- }
-
- // }}}
- // {{{ freeResult()
-
- /**
- * Free the internal resources associated with $result.
- *
- * @param $result MySQL result identifier or DB statement identifier
- *
- * @access public
- *
- * @return bool TRUE on success, FALSE if $result is invalid
- */
- function freeResult($result)
- {
- if (is_resource($result)) {
- return mysql_free_result($result);
- }
-
- if (!isset($this->prepare_tokens[$result])) {
- return false;
- }
-
- unset($this->prepare_tokens[$result]);
- unset($this->prepare_types[$result]);
-
- return true;
- }
-
- // }}}
- // {{{ 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 $rows;
- }
-
- // }}}
- // {{{ affectedRows()
-
- /**
- * Gets the number of rows affected by the data manipulation
- * query. For other queries, this function returns 0.
- *
- * @return number of rows affected by the last query
- */
-
- function affectedRows()
- {
- if (DB::isManip($this->last_query)) {
- $result = mysql_affected_rows($this->connection);
- } else {
- $result = 0;
- }
- return $result;
- }
-
- // }}}
- // {{{ errorNative()
-
- /**
- * Get the native error code of the last error (if any) that
- * occured on the current connection.
- *
- * @access public
- *
- * @return int native MySQL error code
- */
-
- function errorNative()
- {
- return mysql_errno($this->connection);
- }
-
- // }}}
- // {{{ nextId()
-
- /**
- * Get the next value in a sequence. We emulate sequences
- * for MySQL. Will create the sequence if it does not exist.
- *
- * @access public
- *
- * @param $seq_name the name of the sequence
- *
- * @param $ondemand whether to create the sequence table on demand
- * (default is true)
- *
- * @return a sequence integer, or a DB error
- */
- function nextId($seq_name, $ondemand = true)
- {
- $sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
- $repeat = 0;
- do {
- $result = $this->query("INSERT INTO ${sqn}_seq VALUES(NULL)");
- if ($ondemand && DB::isError($result) &&
- $result->getCode() == DB_ERROR_NOSUCHTABLE) {
- $repeat = 1;
- $result = $this->createSequence($seq_name);
- if (DB::isError($result)) {
- return $result;
- }
- } else {
- $repeat = 0;
- }
- } while ($repeat);
- if (DB::isError($result)) {
- return $result;
- }
- return mysql_insert_id($this->connection);
- }
-
- // }}}
- // {{{ createSequence()
-
- function createSequence($seq_name)
- {
- $sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
- return $this->query("CREATE TABLE ${sqn}_seq ".
- "(id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,".
- " PRIMARY KEY(id))");
- }
-
- // }}}
- // {{{ dropSequence()
-
- function dropSequence($seq_name)
- {
- $sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
- return $this->query("DROP TABLE ${sqn}_seq");
- }
-
- // }}}
- // {{{ modifyQuery()
-
- function modifyQuery($query)
- {
- if ($this->options['optimize'] == 'portability') {
- // "DELETE FROM table" gives 0 affected rows in MySQL.
- // This little hack lets you know how many rows were deleted.
- if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
- $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
- 'DELETE FROM \1 WHERE 1=1', $query);
- }
- }
- return $query;
- }
-
- // }}}
- // {{{ mysqlRaiseError()
-
- function mysqlRaiseError($errno = null)
- {
- if ($errno === null) {
- return $this->raiseError($this->errorCode(mysql_errno($this->connection)));
- }
- return $this->raiseError($this->errorCode($errno));
- }
-
- // }}}
-
- // TODO/wishlist:
- // simpleFetch
- // simpleGet
- // longReadlen
- // binmode
- }
-
- ?>
-