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fbsql.php
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PHP Script
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2004-10-01
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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: Frank M. Kromann <frank@frontbase.com> |
// | Maintainer: Daniel Convissor <danielc@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: fbsql.php,v 1.36 2004/06/24 15:24:56 danielc Exp $
// XXX legend:
//
// XXX ERRORMSG: The error message from the fbsql function should
// be registered here.
//
// TODO/wishlist:
// longReadlen
// binmode
require_once 'DB/common.php';
/**
* Database independent query interface definition for PHP's FrontBase
* extension.
*
* @package DB
* @version $Id: fbsql.php,v 1.36 2004/06/24 15:24:56 danielc Exp $
* @category Database
* @author Frank M. Kromann <frank@frontbase.com>
*/
class DB_fbsql extends DB_common
{
// {{{ properties
var $connection;
var $phptype, $dbsyntax;
var $prepare_tokens = array();
var $prepare_types = array();
var $num_rows = array();
var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */
// }}}
// {{{ constructor
/**
* DB_fbsql constructor.
*
* @access public
*/
function DB_fbsql()
{
$this->DB_common();
$this->phptype = 'fbsql';
$this->dbsyntax = 'fbsql';
$this->features = array(
'prepare' => false,
'pconnect' => true,
'transactions' => true,
'limit' => 'emulate'
);
$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 $persistent (optional) whether the connection should
* be persistent
* @access public
* @return int DB_OK on success, a DB error on failure
*/
function connect($dsninfo, $persistent = false)
{
if (!DB::assertExtension('fbsql')) {
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
}
$this->dsn = $dsninfo;
$dbhost = $dsninfo['hostspec'] ? $dsninfo['hostspec'] : 'localhost';
$php_errormsg = '';
$connect_function = $persistent ? 'fbsql_pconnect' : 'fbsql_connect';
if ($dbhost && $dsninfo['username'] && $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 (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 (!fbsql_select_db($dsninfo['database'], $conn)) {
return $this->fbsqlRaiseError();
}
}
$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()
{
$ret = @fbsql_close($this->connection);
$this->connection = null;
return $ret;
}
// }}}
// {{{ simpleQuery()
/**
* Send a query to fbsql and return the results as a fbsql resource
* identifier.
*
* @param the SQL query
*
* @access public
*
* @return mixed returns a valid fbsql result for successful SELECT
* queries, DB_OK for other successful queries. A DB error is
* returned on failure.
*/
function simpleQuery($query)
{
$this->last_query = $query;
$query = $this->modifyQuery($query);
$result = @fbsql_query("$query;", $this->connection);
if (!$result) {
return $this->fbsqlRaiseError();
}
// Determine which queries that should return data, and which
// should return an error code only.
if (DB::isManip($query)) {
return DB_OK;
}
$numrows = $this->numrows($result);
if (is_object($numrows)) {
return $numrows;
}
$this->num_rows[(int)$result] = $numrows;
return $result;
}
// }}}
// {{{ nextResult()
/**
* Move the internal fbsql result pointer to the next available result
*
* @param a valid fbsql result resource
*
* @access public
*
* @return true if a result is available otherwise return false
*/
function nextResult($result)
{
return @fbsql_next_result($result);
}
// }}}
// {{{ 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 (!@fbsql_data_seek($result, $rownum)) {
return null;
}
}
if ($fetchmode & DB_FETCHMODE_ASSOC) {
$arr = @fbsql_fetch_array($result, FBSQL_ASSOC);
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
$arr = array_change_key_case($arr, CASE_LOWER);
}
} else {
$arr = @fbsql_fetch_row($result);
}
if (!$arr) {
$errno = @fbsql_errno($this->connection);
if (!$errno) {
return null;
}
return $this->fbsqlRaiseError($errno);
}
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()
/**
* Free the internal resources associated with $result.
*
* @param $result fbsql result identifier
*
* @access public
*
* @return bool true on success, false if $result is invalid
*/
function freeResult($result)
{
return @fbsql_free_result($result);
}
// }}}
// {{{ autoCommit()
function autoCommit($onoff=false)
{
if ($onoff) {
$this->query("SET COMMIT TRUE");
} else {
$this->query("SET COMMIT FALSE");
}
}
// }}}
// {{{ commit()
function commit()
{
@fbsql_commit();
}
// }}}
// {{{ rollback()
function rollback()
{
@fbsql_rollback();
}
// }}}
// {{{ numCols()
/**
* Get the number of columns in a result set.
*
* @param $result fbsql result identifier
*
* @access public
*
* @return int the number of columns per row in $result
*/
function numCols($result)
{
$cols = @fbsql_num_fields($result);
if (!$cols) {
return $this->fbsqlRaiseError();
}
return $cols;
}
// }}}
// {{{ numRows()
/**
* Get the number of rows in a result set.
*
* @param $result fbsql result identifier
*
* @access public
*
* @return int the number of rows in $result
*/
function numRows($result)
{
$rows = @fbsql_num_rows($result);
if ($rows === null) {
return $this->fbsqlRaiseError();
}
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)) {
$result = @fbsql_affected_rows($this->connection);
} else {
$result = 0;
}
return $result;
}
// }}}
// {{{ errorNative()
/**
* Get the native error code of the last error (if any) that
* occured on the current connection.
*
* @access public
*
* @return int native fbsql error code
*/
function errorNative()
{
return @fbsql_errno($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);
$repeat = 0;
do {
$result = $this->query("INSERT INTO ${seqname} (id) VALUES (NULL)");
if ($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 $result;
}
return @fbsql_insert_id($this->connection);
}
/**
* 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);
return $this->query("CREATE TABLE ${seqname} ".
'(id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,'.
' PRIMARY KEY(id))');
}
// }}}
// {{{ 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)
{
$seqname = $this->getSequenceName($seq_name);
return $this->query("DROP TABLE ${seqname} RESTRICT");
}
// }}}
// {{{ modifyQuery()
function modifyQuery($query)
{
if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) {
// "DELETE FROM table" gives 0 affected rows in fbsql.
// This little hack lets you know how many rows were deleted.
if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
'DELETE FROM \1 WHERE 1=1', $query);
}
}
return $query;
}
// }}}
// {{{ quoteSmart()
/**
* Format input so it can be safely used in a query
*
* @param mixed $in data to be quoted
*
* @return mixed Submitted variable's type = returned value:
* + null = the string <samp>NULL</samp>
* + boolean = string <samp>TRUE</samp> or <samp>FALSE</samp>
* + integer or double = the unquoted number
* + other (including strings and numeric strings) =
* the data escaped according to MySQL's settings
* then encapsulated between single quotes
*
* @internal
*/
function quoteSmart($in)
{
if (is_int($in) || is_double($in)) {
return $in;
} elseif (is_bool($in)) {
return $in ? 'TRUE' : 'FALSE';
} elseif (is_null($in)) {
return 'NULL';
} else {
return "'" . $this->escapeSimple($in) . "'";
}
}
// }}}
// {{{ fbsqlRaiseError()
/**
* Gather information about an error, then use that info to create a
* DB error object and finally return that object.
*
* @param integer $errno PEAR error number (usually a DB constant) if
* manually raising an error
* @return object DB error object
* @see DB_common::errorCode()
* @see DB_common::raiseError()
*/
function fbsqlRaiseError($errno = null)
{
if ($errno === null) {
$errno = $this->errorCode(fbsql_errno($this->connection));
}
return $this->raiseError($errno, null, null, null,
@fbsql_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.
*/
$id = @fbsql_list_fields($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 $this->fbsqlRaiseError(DB_ERROR_NEED_MORE_DATA);
}
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
$case_func = 'strtolower';
} else {
$case_func = 'strval';
}
$count = @fbsql_num_fields($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'] = $case_func(@fbsql_field_table($id, $i));
$res[$i]['name'] = $case_func(@fbsql_field_name($id, $i));
$res[$i]['type'] = @fbsql_field_type($id, $i);
$res[$i]['len'] = @fbsql_field_len($id, $i);
$res[$i]['flags'] = @fbsql_field_flags($id, $i);
}
} else { // full
$res["num_fields"]= $count;
for ($i=0; $i<$count; $i++) {
$res[$i]['table'] = $case_func(@fbsql_field_table($id, $i));
$res[$i]['name'] = $case_func(@fbsql_field_name($id, $i));
$res[$i]['type'] = @fbsql_field_type($id, $i);
$res[$i]['len'] = @fbsql_field_len($id, $i);
$res[$i]['flags'] = @fbsql_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']] = $i;
}
}
}
// free the result only if we were called on a table
if ($got_string) {
@fbsql_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 'select "table_name" from information_schema.tables';
default:
return null;
}
}
// }}}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>