home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Personal Computer World 2005 October
/
PCWOCT05.iso
/
Software
/
FromTheMag
/
XAMPP 1.4.14
/
xampp-win32-1.4.14-installer.exe
/
xampp
/
php
/
pear
/
DB
/
ifx.php
< prev
next >
Wrap
PHP Script
|
2004-10-01
|
18KB
|
580 lines
<?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: Tomas V.V.Cox <cox@idecnet.com> |
// | Maintainer: Daniel Convissor <danielc@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: ifx.php,v 1.47 2004/03/05 01:46:53 danielc Exp $
// Legend:
// For more info on Informix errors see:
// http://www.informix.com/answers/english/ierrors.htm
//
// TODO:
// - set needed env Informix vars on connect
// - implement native prepare/execute
require_once 'DB/common.php';
/**
* Database independent query interface definition for PHP's Informix
* extension.
*
* @package DB
* @version $Id: ifx.php,v 1.47 2004/03/05 01:46:53 danielc Exp $
* @category Database
* @author Tomas V.V.Cox <cox@idecnet.com>
*/
class DB_ifx extends DB_common
{
// {{{ properties
var $connection;
var $affected = 0;
var $dsn = array();
var $transaction_opcount = 0;
var $autocommit = true;
var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */
// }}}
// {{{ constructor
function DB_ifx()
{
$this->phptype = 'ifx';
$this->dbsyntax = 'ifx';
$this->features = array(
'prepare' => false,
'pconnect' => true,
'transactions' => true,
'limit' => 'emulate'
);
$this->errorcode_map = array(
'-201' => DB_ERROR_SYNTAX,
'-206' => DB_ERROR_NOSUCHTABLE,
'-217' => DB_ERROR_NOSUCHFIELD,
'-239' => DB_ERROR_CONSTRAINT,
'-253' => DB_ERROR_SYNTAX,
'-292' => DB_ERROR_CONSTRAINT_NOT_NULL,
'-310' => DB_ERROR_ALREADY_EXISTS,
'-329' => DB_ERROR_NODBSELECTED,
'-346' => DB_ERROR_CONSTRAINT,
'-386' => DB_ERROR_CONSTRAINT_NOT_NULL,
'-391' => DB_ERROR_CONSTRAINT_NOT_NULL,
'-554' => DB_ERROR_SYNTAX,
'-691' => DB_ERROR_CONSTRAINT,
'-703' => DB_ERROR_CONSTRAINT_NOT_NULL,
'-1204' => DB_ERROR_INVALID_DATE,
'-1205' => DB_ERROR_INVALID_DATE,
'-1206' => DB_ERROR_INVALID_DATE,
'-1209' => DB_ERROR_INVALID_DATE,
'-1210' => DB_ERROR_INVALID_DATE,
'-1212' => DB_ERROR_INVALID_DATE,
'-1213' => DB_ERROR_INVALID_NUMBER,
);
}
// }}}
// {{{ connect()
/**
* Connect to a database and log in as the specified user.
*
* @param $dsn the data source name (see DB::parseDSN for syntax)
* @param $persistent (optional) whether the connection should
* be persistent
*
* @return int DB_OK on success, a DB error code on failure
*/
function connect($dsninfo, $persistent = false)
{
if (!DB::assertExtension('informix') &&
!DB::assertExtension('Informix'))
{
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
}
$this->dsn = $dsninfo;
$dbhost = $dsninfo['hostspec'] ? '@' . $dsninfo['hostspec'] : '';
$dbname = $dsninfo['database'] ? $dsninfo['database'] . $dbhost : '';
$user = $dsninfo['username'] ? $dsninfo['username'] : '';
$pw = $dsninfo['password'] ? $dsninfo['password'] : '';
$connect_function = $persistent ? 'ifx_pconnect' : 'ifx_connect';
$this->connection = @$connect_function($dbname, $user, $pw);
if (!is_resource($this->connection)) {
return $this->ifxraiseError(DB_ERROR_CONNECT_FAILED);
}
return DB_OK;
}
// }}}
// {{{ disconnect()
/**
* Log out and disconnect from the database.
*
* @return bool true on success, false if not connected.
*/
function disconnect()
{
$ret = @ifx_close($this->connection);
$this->connection = null;
return $ret;
}
// }}}
// {{{ simpleQuery()
/**
* Send a query to Informix and return the results as a
* Informix resource identifier.
*
* @param $query the SQL query
*
* @return int returns a valid Informix result for successful SELECT
* queries, DB_OK for other successful queries. A DB error code
* is returned on failure.
*/
function simpleQuery($query)
{
$ismanip = DB::isManip($query);
$this->last_query = $query;
$this->affected = null;
if (preg_match('/(SELECT)/i', $query)) { //TESTME: Use !DB::isManip()?
// the scroll is needed for fetching absolute row numbers
// in a select query result
$result = @ifx_query($query, $this->connection, IFX_SCROLL);
} else {
if (!$this->autocommit && $ismanip) {
if ($this->transaction_opcount == 0) {
$result = @ifx_query('BEGIN WORK', $this->connection);
if (!$result) {
return $this->ifxraiseError();
}
}
$this->transaction_opcount++;
}
$result = @ifx_query($query, $this->connection);
}
if (!$result) {
return $this->ifxraiseError();
}
$this->affected = @ifx_affected_rows($result);
// Determine which queries should return data, and which
// should return an error code only.
if (preg_match('/(SELECT)/i', $query)) {
return $result;
}
// XXX Testme: free results inside a transaction
// may cause to stop it and commit the work?
// Result has to be freed even with a insert or update
@ifx_free_result($result);
return DB_OK;
}
// }}}
// {{{ nextResult()
/**
* Move the internal ifx 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($result)
{
return false;
}
// }}}
// {{{ affectedRows()
/**
* Gets the number of rows affected by the last query.
* if the last query was a select, returns 0.
*
* @return number of rows affected by the last query
*/
function affectedRows()
{
if (DB::isManip($this->last_query)) {
return $this->affected;
} else {
return 0;
}
}
// }}}
// {{{ 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) && ($rownum < 0)) {
return null;
}
if ($rownum === null) {
/*
* Even though fetch_row() should return the next row if
* $rownum is null, it doesn't in all cases. Bug 598.
*/
$rownum = 'NEXT';
} else {
// Index starts at row 1, unlike most DBMS's starting at 0.
$rownum++;
}
if (!$arr = @ifx_fetch_row($result, $rownum)) {
return null;
}
if ($fetchmode !== DB_FETCHMODE_ASSOC) {
$i=0;
$order = array();
foreach ($arr as $val) {
$order[$i++] = $val;
}
$arr = $order;
} elseif ($fetchmode == DB_FETCHMODE_ASSOC &&
$this->options['portability'] & DB_PORTABILITY_LOWERCASE)
{
$arr = array_change_key_case($arr, CASE_LOWER);
}
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;
}
// }}}
// {{{ numRows()
function numRows($result)
{
return $this->raiseError(DB_ERROR_NOT_CAPABLE);
}
// }}}
// {{{ numCols()
/**
* Get the number of columns in a result set.
*
* @param $result Informix result identifier
*
* @return int the number of columns per row in $result
*/
function numCols($result)
{
if (!$cols = @ifx_num_fields($result)) {
return $this->ifxraiseError();
}
return $cols;
}
// }}}
// {{{ freeResult()
/**
* Free the internal resources associated with $result.
*
* @param $result Informix result identifier
*
* @return bool true on success, false if $result is invalid
*/
function freeResult($result)
{
return @ifx_free_result($result);
}
// }}}
// {{{ autoCommit()
/**
* Enable/disable automatic commits
*/
function autoCommit($onoff = true)
{
// 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) {
$result = @ifx_query('COMMIT WORK', $this->connection);
$this->transaction_opcount = 0;
if (!$result) {
return $this->ifxRaiseError();
}
}
return DB_OK;
}
// }}}
// {{{ rollback()
/**
* Roll back (undo) the current transaction.
*/
function rollback()
{
if ($this->transaction_opcount > 0) {
$result = @ifx_query('ROLLBACK WORK', $this->connection);
$this->transaction_opcount = 0;
if (!$result) {
return $this->ifxRaiseError();
}
}
return DB_OK;
}
// }}}
// {{{ ifxraiseError()
/**
* Gather information about an error, then use that info to create a
* DB error object and finally return that object.
*
* @param integer $errno PEAR error number (usually a DB constant) if
* manually raising an error
* @return object DB error object
* @see errorNative()
* @see errorCode()
* @see DB_common::raiseError()
*/
function ifxraiseError($errno = null)
{
if ($errno === null) {
$errno = $this->errorCode(ifx_error());
}
return $this->raiseError($errno, null, null, null,
$this->errorNative());
}
// }}}
// {{{ errorCode()
/**
* Map native error codes to DB's portable ones.
*
* Requires that the DB implementation's constructor fills
* in the <var>$errorcode_map</var> property.
*
* @param string $nativecode error code returned by the database
* @return int a portable DB error code, or DB_ERROR if this DB
* implementation has no mapping for the given error code.
*/
function errorCode($nativecode)
{
if (ereg('SQLCODE=(.*)]', $nativecode, $match)) {
$code = $match[1];
if (isset($this->errorcode_map[$code])) {
return $this->errorcode_map[$code];
}
}
return DB_ERROR;
}
// }}}
// {{{ errorNative()
/**
* Get the native error message of the last error (if any) that
* occured on the current connection.
*
* @return int native Informix error code
*/
function errorNative()
{
return @ifx_error() . ' ' . @ifx_errormsg();
}
// }}}
// {{{ 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 ($type) {
case 'tables':
return 'select tabname from systables where tabid >= 100';
default:
return null;
}
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table or a result set.
*
* NOTE: only supports 'table' if <var>$result</var> is a table name.
*
* If analyzing a query result and the result has duplicate field names,
* an error will be raised saying
* <samp>can't distinguish duplicate field names</samp>.
*
* @param object|string $result DB_result object from a query or a
* string containing the name of a table
* @param int $mode a valid tableInfo mode
* @return array an associative array with the information requested
* or an error object if something is wrong
* @access public
* @internal
* @since 1.6.0
* @see DB_common::tableInfo()
*/
function tableInfo($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 = @ifx_query("SELECT * FROM $result WHERE 1=0",
$this->connection);
$got_string = true;
} else {
/*
* Probably received a result resource identifier.
* Copy it.
*/
$id = $result;
$got_string = false;
}
if (!is_resource($id)) {
return $this->ifxRaiseError(DB_ERROR_NEED_MORE_DATA);
}
$flds = @ifx_fieldproperties($id);
$count = @ifx_num_fields($id);
if (count($flds) != $count) {
return $this->raiseError("can't distinguish duplicate field names");
}
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
$case_func = 'strtolower';
} else {
$case_func = 'strval';
}
$i = 0;
// made this IF due to performance (one if is faster than $count if's)
if (!$mode) {
foreach ($flds as $key => $value) {
$props = explode(';', $value);
$res[$i]['table'] = $got_string ? $case_func($result) : '';
$res[$i]['name'] = $case_func($key);
$res[$i]['type'] = $props[0];
$res[$i]['len'] = $props[1];
$res[$i]['flags'] = $props[4] == 'N' ? 'not_null' : '';
$i++;
}
} else { // full
$res['num_fields'] = $count;
foreach ($flds as $key => $value) {
$props = explode(';', $value);
$res[$i]['table'] = $got_string ? $case_func($result) : '';
$res[$i]['name'] = $case_func($key);
$res[$i]['type'] = $props[0];
$res[$i]['len'] = $props[1];
$res[$i]['flags'] = $props[4] == 'N' ? 'not_null' : '';
if ($mode & DB_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & DB_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
$i++;
}
}
// free the result only if we were called on a table
if ($got_string) {
@ifx_free_result($id);
}
return $res;
}
// }}}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>