<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* The PEAR DB driver for PHP's msql extension
* for interacting with Mini SQL databases
*
* PHP's mSQL extension did weird things with NULL values prior to PHP
* 4.3.11 and 5.0.4. Make sure your version of PHP meets or exceeds
* those versions.
*
* 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 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: msql.php,v 1.57 2005/02/22 07:26:46 danielc 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 msql extension
* for interacting with Mini SQL databases
*
* These methods overload the ones declared in DB_common.
*
* PHP's mSQL extension did weird things with NULL values prior to PHP
* 4.3.11 and 5.0.4. Make sure your version of PHP meets or exceeds
* those versions.
*
* @category Database
* @package DB
* @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: 1.7.6
* @link http://pear.php.net/package/DB
* @since Class not functional until Release 1.7.0
*/
class DB_msql extends DB_common
{
// {{{ properties
/**
* The DB driver type (mysql, oci8, odbc, etc.)
* @var string
*/
var $phptype = 'msql';
/**
* The database syntax variant to be used (db2, access, etc.), if any
* @var string
*/
var $dbsyntax = 'msql';
/**
* 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' => false,
);
/**
* A mapping of native error codes to DB error codes
* @var array
*/
var $errorcode_map = array(
);
/**
* The raw database connection created by PHP
* @var resource
*/
var $connection;
/**
* The DSN information for connecting to a database
* @var array
*/
var $dsn = array();
/**
* The query result resource created by PHP
*
* Used to make affectedRows() work. Only contains the result for
* data manipulation queries. Contains false for other queries.
*
* @var resource
* @access private
*/
var $_result;
// }}}
// {{{ constructor
/**
* This constructor calls <kbd>$this->DB_common()</kbd>
*
* @return void
*/
function DB_msql()
{
$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.
*
* Example of how to connect:
* <code>
* require_once 'DB.php';
*
* // $dsn = 'msql://hostname/dbname'; // use a TCP connection
* $dsn = 'msql:///dbname'; // use a socket
* $options = array(
* 'portability' => DB_PORTABILITY_ALL,
* );
*
* $db =& DB::connect($dsn, $options);
* if (PEAR::isError($db)) {
* die($db->getMessage());
* }
* </code>
*
* @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('msql')) {
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
}
$this->dsn = $dsn;
if ($dsn['dbsyntax']) {
$this->dbsyntax = $dsn['dbsyntax'];
}
$params = array();
if ($dsn['hostspec']) {
$params[] = $dsn['port']
? $dsn['hostspec'] . ',' . $dsn['port']
: $dsn['hostspec'];
}
$connect_function = $persistent ? 'msql_pconnect' : 'msql_connect';
$ini = ini_get('track_errors');
$php_errormsg = '';
if ($ini) {
$this->connection = @call_user_func_array($connect_function,
$params);
} else {
ini_set('track_errors', 1);
$this->connection = @call_user_func_array($connect_function,
$params);
ini_set('track_errors', $ini);
}
if (!$this->connection) {
if (($err = @msql_error()) != '') {
return $this->raiseError(DB_ERROR_CONNECT_FAILED,
null, null, null,
$err);
} else {
return $this->raiseError(DB_ERROR_CONNECT_FAILED,
null, null, null,
$php_errormsg);
}
}
if (!@msql_select_db($dsn['database'], $this->connection)) {
return $this->msqlRaiseError();
}
return DB_OK;
}
// }}}
// {{{ disconnect()
/**
* Disconnects from the database server
*
* @return bool TRUE on success, FALSE on failure
*/
function disconnect()
{
$ret = @msql_close($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)
{
$this->last_query = $query;
$query = $this->modifyQuery($query);
$result = @msql_query($query, $this->connection);
if (!$result) {
return $this->msqlRaiseError();
}
// Determine which queries that should return data, and which
// should return an error code only.
if (DB::isManip($query)) {
$this->_result = $result;
return DB_OK;
} else {
$this->_result = false;
return $result;
}
}
// }}}
// {{{ nextResult()
/**
* Move the internal msql result pointer to the next available result
*
* @param a valid fbsql result resource
*
* @access public
*
* @return true if a result is available otherwise return false
*/
function nextResult($result)
{
return false;
}
// }}}
// {{{ 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.
*
* PHP's mSQL extension did weird things with NULL values prior to PHP
* 4.3.11 and 5.0.4. Make sure your version of PHP meets or exceeds
* those versions.
*
* @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 (!@msql_data_seek($result, $rownum)) {
return null;
}
}
if ($fetchmode & DB_FETCHMODE_ASSOC) {
$arr = @msql_fetch_array($result, MSQL_ASSOC);
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
$arr = array_change_key_case($arr, CASE_LOWER);
}
} else {
$arr = @msql_fetch_row($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 @msql_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)
{
$cols = @msql_num_fields($result);
if (!$cols) {
return $this->msqlRaiseError();
}
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)
{
$rows = @msql_num_rows($result);
if ($rows === false) {
return $this->msqlRaiseError();
}
return $rows;
}
// }}}
// {{{ affected()
/**
* Determines the number of rows affected by a data maniuplation query
*
* 0 is returned for queries that don't manipulate data.
*
* @return int the number of rows. A DB_Error object on failure.
*/
function affectedRows()
{
if (!$this->_result) {
return 0;
}
return msql_affected_rows($this->_result);
}
// }}}
// {{{ nextId()
/**
* Returns the next free id in a sequence
*
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true, the seqence is automatically
* created if it does not exist
*
* @return int the next id number in the sequence.
* A DB_Error object on failure.
*
* @see DB_common::nextID(), DB_common::getSequenceName(),
* DB_msql::createSequence(), DB_msql::dropSequence()
*/
function nextId($seq_name, $ondemand = true)
{
$seqname = $this->getSequenceName($seq_name);
$repeat = false;
do {
$this->pushErrorHandling(PEAR_ERROR_RETURN);
$result =& $this->query("SELECT _seq FROM ${seqname}");
$this->popErrorHandling();
if ($ondemand && DB::isError($result) &&
$result->getCode() == DB_ERROR_NOSUCHTABLE) {
$repeat = true;
$this->pushErrorHandling(PEAR_ERROR_RETURN);
$result = $this->createSequence($seq_name);
$this->popErrorHandling();
if (DB::isError($result)) {
return $this->raiseError($result);
}
} else {
$repeat = false;
}
} while ($repeat);
if (DB::isError($result)) {
return $this->raiseError($result);
}
$arr = $result->fetchRow(DB_FETCHMODE_ORDERED);
$result->free();
return $arr[0];
}
// }}}
// {{{ createSequence()
/**
* Creates a new sequence
*
* Also creates a new table to associate the sequence with. Uses
* a separate table to ensure portability with other drivers.
*
* @param string $seq_name name of the new sequence
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::createSequence(), DB_common::getSequenceName(),
* DB_msql::nextID(), DB_msql::dropSequence()
*/
function createSequence($seq_name)
{
$seqname = $this->getSequenceName($seq_name);
$res = $this->query('CREATE TABLE ' . $seqname
. ' (id INTEGER NOT NULL)');
if (DB::isError($res)) {
return $res;
}
$res = $this->query("CREATE SEQUENCE ON ${seqname}");
return $res;
}
// }}}
// {{{ dropSequence()
/**
* Deletes a sequence
*
* @param string $seq_name name of the sequence to be deleted
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::dropSequence(), DB_common::getSequenceName(),
* DB_msql::nextID(), DB_msql::createSequence()
*/
function dropSequence($seq_name)
{
return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
}
// }}}
// {{{ quoteIdentifier()
/**
* mSQL does not support delimited identifiers
*
* @param string $str the identifier name to be quoted
*
* @return object a DB_Error object
*
* @see DB_common::quoteIdentifier()
* @since Method available since Release 1.7.0
*/
function quoteIdentifier($str)
{
return $this->raiseError(DB_ERROR_UNSUPPORTED);
}
// }}}
// {{{ escapeSimple()
/**
* Escapes a string according to the current DBMS's standards
*
* @param string $str the string to be escaped
*
* @return string the escaped string
*
* @see DB_common::quoteSmart()
* @since Method available since Release 1.7.0
*/
function escapeSimple($str)
{
return addslashes($str);
}
// }}}
// {{{ msqlRaiseError()
/**
* Produces a DB_Error object regarding the current problem
*
* @param int $errno if the error is being manually raised pass a
* DB_ERROR* constant here. If this isn't passed
* the error information gathered from the DBMS.
*
* @return object the DB_Error object
*
* @see DB_common::raiseError(),
* DB_msql::errorNative(), DB_msql::errorCode()
*/
function msqlRaiseError($errno = null)
{
$native = $this->errorNative();
if ($errno === null) {
$errno = $this->errorCode($native);
}
return $this->raiseError($errno, null, null, null, $native);
}
// }}}
// {{{ errorNative()
/**
* Gets the DBMS' native error message produced by the last query
*
* @return string the DBMS' error message
*/
function errorNative()
{
return @msql_error();
}
// }}}
// {{{ errorCode()
/**
* Determines PEAR::DB error code from the database's text error message
*
* @param string $errormsg the error message returned from the database
*
* @return integer the error number from a DB_ERROR* constant
*/
function errorCode($errormsg)
{
static $error_regexps;
if (!isset($error_regexps)) {
$error_regexps = array(
'/^Access to database denied/i'
=> DB_ERROR_ACCESS_VIOLATION,
'/^Bad index name/i'
=> DB_ERROR_ALREADY_EXISTS,
'/^Bad order field/i'
=> DB_ERROR_SYNTAX,
'/^Bad type for comparison/i'
=> DB_ERROR_SYNTAX,
'/^Can\'t perform LIKE on/i'
=> DB_ERROR_SYNTAX,
'/^Can\'t use TEXT fields in LIKE comparison/i'
=> DB_ERROR_SYNTAX,
'/^Couldn\'t create temporary table/i'
=> DB_ERROR_CANNOT_CREATE,
'/^Error creating table file/i'
=> DB_ERROR_CANNOT_CREATE,
'/^Field .* cannot be null$/i'
=> DB_ERROR_CONSTRAINT_NOT_NULL,
'/^Index (field|condition) .* cannot be null$/i'
=> DB_ERROR_SYNTAX,
'/^Invalid date format/i'
=> DB_ERROR_INVALID_DATE,
'/^Invalid time format/i'
=> DB_ERROR_INVALID,
'/^Literal value for .* is wrong type$/i'
=> DB_ERROR_INVALID_NUMBER,
'/^No Database Selected/i'
=> DB_ERROR_NODBSELECTED,
'/^No value specified for field/i'
=> DB_ERROR_VALUE_COUNT_ON_ROW,
'/^Non unique value for unique index/i'
=> DB_ERROR_CONSTRAINT,
'/^Out of memory for temporary table/i'
=> DB_ERROR_CANNOT_CREATE,
'/^Permission denied/i'
=> DB_ERROR_ACCESS_VIOLATION,
'/^Reference to un-selected table/i'
=> DB_ERROR_SYNTAX,
'/^syntax error/i'
=> DB_ERROR_SYNTAX,
'/^Table .* exists$/i'
=> DB_ERROR_ALREADY_EXISTS,
'/^Unknown database/i'
=> DB_ERROR_NOSUCHDB,
'/^Unknown field/i'
=> DB_ERROR_NOSUCHFIELD,
'/^Unknown (index|system variable)/i'
=> DB_ERROR_NOT_FOUND,
'/^Unknown table/i'
=> DB_ERROR_NOSUCHTABLE,
'/^Unqualified field/i'
=> DB_ERROR_SYNTAX,
);
}
foreach ($error_regexps as $regexp => $code) {
if (preg_match($regexp, $errormsg)) {
return $code;
}
}
return DB_ERROR;
}
// }}}
// {{{ 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.
* While this also accepts a query result
* resource identifier, this behavior is
* deprecated.
* @param int $mode a valid tableInfo mode
*
* @return array an associative array with the information requested.
* A DB_Error object on failure.
*
* @see DB_common::setOption()
*/
function tableInfo($result, $mode = null)
{
if (is_string($result)) {
/*
* Probably received a table name.
* Create a result resource identifier.
*/
$id = @msql_query("SELECT * FROM $result",
$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 $this->raiseError(DB_ERROR_NEED_MORE_DATA);
}
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
$case_func = 'strtolower';
} else {
$case_func = 'strval';
}
$count = @msql_num_fields($id);
$res = array();
if ($mode) {
$res['num_fields'] = $count;
}
for ($i = 0; $i < $count; $i++) {
$tmp = @msql_fetch_field($id);
$flags = '';
if ($tmp->not_null) {
$flags .= 'not_null ';
}
if ($tmp->unique) {
$flags .= 'unique_key ';
}
$flags = trim($flags);
$res[$i] = array(
'table' => $case_func($tmp->table),
'name' => $case_func($tmp->name),
'type' => $tmp->type,
'len' => msql_field_len($id, $i),
'flags' => $flags,
);
if ($mode & DB_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & DB_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
}
// free the result only if we were called on a table
if ($got_string) {
@msql_free_result($id);
}
return $res;
}
// }}}
// {{{ getSpecialQuery()
/**
* Obtain a list of a given type of objects
*
* @param string $type the kind of objects you want to retrieve
*
* @return array the array containing the list of objects requested
*
* @access protected
* @see DB_common::getListOf()
*/
function getSpecialQuery($type)
{
switch ($type) {
case 'databases':
$id = @msql_list_dbs($this->connection);
break;
case 'tables':
$id = @msql_list_tables($this->dsn['database'],
$this->connection);
break;
default:
return null;
}
if (!$id) {
return $this->msqlRaiseError();
}
$out = array();
while ($row = @msql_fetch_row($id)) {
$out[] = $row[0];
}
return $out;
}
// }}}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>