mirror of
https://github.com/moodle/moodle.git
synced 2025-03-04 08:06:30 +01:00
538 lines
14 KiB
PHP
538 lines
14 KiB
PHP
<?php
|
|
/*
|
|
V2.50 14 Nov 2002 (c) 2000-2002 John Lim (jlim@natsoft.com.my). All rights reserved.
|
|
Released under both BSD license and Lesser GPL library license.
|
|
Whenever there is any discrepancy between the two licenses,
|
|
the BSD license will take precedence.
|
|
Set tabs to 4 for best viewing.
|
|
|
|
Latest version is available at http://php.weblogs.com/
|
|
|
|
Requires ODBC. Works on Windows and Unix.
|
|
*/
|
|
define("_ADODB_ODBC_LAYER", 2 );
|
|
|
|
/*--------------------------------------------------------------------------------------
|
|
--------------------------------------------------------------------------------------*/
|
|
|
|
|
|
class ADODB_odbc extends ADOConnection {
|
|
var $databaseType = "odbc";
|
|
var $fmtDate = "'Y-m-d'";
|
|
var $fmtTimeStamp = "'Y-m-d, h:i:sA'";
|
|
var $replaceQuote = "''"; // string to use to replace quotes
|
|
var $dataProvider = "odbc";
|
|
var $hasAffectedRows = true;
|
|
var $binmode = ODBC_BINMODE_RETURN;
|
|
var $useFetchArray = false; // setting this to true will make array elements in FETCH_ASSOC mode case-sensitive
|
|
// breaking backward-compat
|
|
//var $longreadlen = 8000; // default number of chars to return for a Blob/Long field
|
|
var $_bindInputArray = false;
|
|
var $curmode = SQL_CUR_USE_DRIVER; // See sqlext.h, SQL_CUR_DEFAULT == SQL_CUR_USE_DRIVER == 2L
|
|
var $_genSeqSQL = "create table %s (id integer)";
|
|
var $_autocommit = true;
|
|
var $_haserrorfunctions = true;
|
|
var $_has_stupid_odbc_fetch_api_change = true;
|
|
|
|
function ADODB_odbc()
|
|
{
|
|
$this->_haserrorfunctions = (strnatcmp(PHP_VERSION,'4.0.5')>=0);
|
|
$this->_has_stupid_odbc_fetch_api_change = (strnatcmp(PHP_VERSION,'4.2.0')>=0);
|
|
}
|
|
|
|
function ErrorMsg()
|
|
{
|
|
if ($this->_haserrorfunctions) {
|
|
if (empty($this->_connectionID)) return @odbc_errormsg();
|
|
return @odbc_errormsg($this->_connectionID);
|
|
} else return ADOConnection::ErrorMsg();
|
|
}
|
|
|
|
/*
|
|
This algorithm is not very efficient, but works even if table locking
|
|
is not available.
|
|
|
|
Will return false if unable to generate an ID after $MAXLOOPS attempts.
|
|
*/
|
|
function GenID($seq='adodbseq',$start=1)
|
|
{
|
|
// if you have to modify the parameter below, your database is overloaded,
|
|
// or you need to implement generation of id's yourself!
|
|
$MAXLOOPS = 100;
|
|
|
|
while (--$MAXLOOPS>=0) {
|
|
$num = $this->GetOne("select id from $seq");
|
|
if ($num === false) {
|
|
$this->Execute(sprintf($this->_genSeqSQL ,$seq));
|
|
$start -= 1;
|
|
$num = '0';
|
|
$ok = $this->Execute("insert into $seq values($start)");
|
|
if (!$ok) return false;
|
|
}
|
|
$this->Execute("update $seq set id=id+1 where id=$num");
|
|
|
|
if ($this->affected_rows() == 1) {
|
|
$num += 1;
|
|
$this->genID = $num;
|
|
return $num;
|
|
}
|
|
}
|
|
if ($fn = $this->raiseErrorFn) {
|
|
$fn($this->databaseType,'GENID',-32000,"Unable to generate unique id after $MAXLOOP attempts",$seq,$num);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function ErrorNo()
|
|
{
|
|
if ($this->_haserrorfunctions) {
|
|
if (empty($this->_connectionID)) $e = @odbc_error();
|
|
else $e = @odbc_error($this->_connectionID);
|
|
|
|
// bug in 4.0.6, error number can be corrupted string (should be 6 digits)
|
|
// so we check and patch
|
|
if (strlen($e)<=2) return 0;
|
|
return $e;
|
|
} else return ADOConnection::ErrorNo();
|
|
}
|
|
|
|
|
|
// returns true or false
|
|
function _connect($argDSN, $argUsername, $argPassword, $argDatabasename)
|
|
{
|
|
global $php_errormsg;
|
|
if ($this->debug && $argDatabasename) ADOConnection::outp("For odbc Connect(), $argDatabasename is not used. Place dsn in 1st parameter.");
|
|
$php_errormsg = '';
|
|
$this->_connectionID = odbc_connect($argDSN,$argUsername,$argPassword,$this->curmode);
|
|
$this->_errorMsg = $php_errormsg;
|
|
|
|
//if ($this->_connectionID) odbc_autocommit($this->_connectionID,true);
|
|
return $this->_connectionID != false;
|
|
}
|
|
|
|
// returns true or false
|
|
function _pconnect($argDSN, $argUsername, $argPassword, $argDatabasename)
|
|
{
|
|
global $php_errormsg;
|
|
$php_errormsg = '';
|
|
if ($this->debug && $argDatabasename) ADOConnection::outp("For odbc PConnect(), $argDatabasename is not used. Place dsn in 1st parameter.");
|
|
$this->_connectionID = odbc_pconnect($argDSN,$argUsername,$argPassword,$this->curmode);
|
|
$this->_errorMsg = $php_errormsg;
|
|
|
|
if ($this->_connectionID && $this->autoRollback) @odbc_rollback($this->_connectionID);
|
|
return $this->_connectionID != false;
|
|
}
|
|
|
|
function BeginTrans()
|
|
{
|
|
if ($this->transOff) return true;
|
|
$this->transCnt += 1;
|
|
$this->_autocommit = false;
|
|
return odbc_autocommit($this->_connectionID,false);
|
|
}
|
|
|
|
function CommitTrans($ok=true)
|
|
{
|
|
if ($this->transOff) return true;
|
|
if (!$ok) return $this->RollbackTrans();
|
|
if ($this->transCnt) $this->transCnt -= 1;
|
|
$this->_autocommit = true;
|
|
$ret = odbc_commit($this->_connectionID);
|
|
odbc_autocommit($this->_connectionID,true);
|
|
return $ret;
|
|
}
|
|
|
|
function RollbackTrans()
|
|
{
|
|
if ($this->transOff) return true;
|
|
if ($this->transCnt) $this->transCnt -= 1;
|
|
$this->_autocommit = true;
|
|
$ret = odbc_rollback($this->_connectionID);
|
|
odbc_autocommit($this->_connectionID,true);
|
|
return $ret;
|
|
}
|
|
|
|
function MetaPrimaryKeys($table)
|
|
{
|
|
global $ADODB_FETCH_MODE;
|
|
|
|
$savem = $ADODB_FETCH_MODE;
|
|
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
|
|
$qid = @odbc_primarykeys($this->_connectionID,'','',$table);
|
|
|
|
if (!$qid) {
|
|
$ADODB_FETCH_MODE = $savem;
|
|
return false;
|
|
}
|
|
$rs = new ADORecordSet_odbc($qid);
|
|
$ADODB_FETCH_MODE = $savem;
|
|
|
|
if (!$rs) return false;
|
|
$rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
|
|
|
|
$arr = $rs->GetArray();
|
|
$rs->Close();
|
|
print_r($arr);
|
|
$arr2 = array();
|
|
for ($i=0; $i < sizeof($arr); $i++) {
|
|
if ($arr[$i][3]) $arr2[] = $arr[$i][3];
|
|
}
|
|
return $arr2;
|
|
}
|
|
|
|
function MetaTables()
|
|
{
|
|
global $ADODB_FETCH_MODE;
|
|
|
|
$savem = $ADODB_FETCH_MODE;
|
|
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
|
|
$qid = odbc_tables($this->_connectionID);
|
|
|
|
$rs = new ADORecordSet_odbc($qid);
|
|
|
|
$ADODB_FETCH_MODE = $savem;
|
|
if (!$rs) return false;
|
|
|
|
$rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
|
|
|
|
//print_r($rs);
|
|
$arr = $rs->GetArray();
|
|
$rs->Close();
|
|
$arr2 = array();
|
|
for ($i=0; $i < sizeof($arr); $i++) {
|
|
if ($arr[$i][2]) $arr2[] = $arr[$i][2];
|
|
}
|
|
return $arr2;
|
|
}
|
|
|
|
/*
|
|
/ SQL data type codes /
|
|
#define SQL_UNKNOWN_TYPE 0
|
|
#define SQL_CHAR 1
|
|
#define SQL_NUMERIC 2
|
|
#define SQL_DECIMAL 3
|
|
#define SQL_INTEGER 4
|
|
#define SQL_SMALLINT 5
|
|
#define SQL_FLOAT 6
|
|
#define SQL_REAL 7
|
|
#define SQL_DOUBLE 8
|
|
#if (ODBCVER >= 0x0300)
|
|
#define SQL_DATETIME 9
|
|
#endif
|
|
#define SQL_VARCHAR 12
|
|
|
|
/ One-parameter shortcuts for date/time data types /
|
|
#if (ODBCVER >= 0x0300)
|
|
#define SQL_TYPE_DATE 91
|
|
#define SQL_TYPE_TIME 92
|
|
#define SQL_TYPE_TIMESTAMP 93
|
|
*/
|
|
function ODBCTypes($t)
|
|
{
|
|
switch ((integer)$t) {
|
|
case 1:
|
|
case 12:
|
|
case 0:
|
|
return 'C';
|
|
case -1: //text
|
|
return 'X';
|
|
case -4: //image
|
|
return 'B';
|
|
|
|
case 91:
|
|
case 11:
|
|
return 'D';
|
|
|
|
case 92:
|
|
case 93:
|
|
case 9: return 'T';
|
|
case 4:
|
|
case 5:
|
|
case -6:
|
|
return 'I';
|
|
|
|
case -11: // uniqidentifier
|
|
return 'R';
|
|
case -7: //bit
|
|
return 'L';
|
|
|
|
default:
|
|
return 'N';
|
|
}
|
|
}
|
|
|
|
function MetaColumns($table)
|
|
{
|
|
global $ADODB_FETCH_MODE;
|
|
|
|
$table = strtoupper($table);
|
|
|
|
/* // for some reason, cannot view only 1 table with odbc_columns -- bug?
|
|
$qid = odbc_tables($this->_connectionID);
|
|
$rs = new ADORecordSet_odbc($qid);
|
|
if (!$rs) return false;
|
|
while (!$rs->EOF) {
|
|
if ($table == strtoupper($rs->fields[2])) {
|
|
$q = $rs->fields[0];
|
|
$o = $rs->fields[1];
|
|
break;
|
|
}
|
|
$rs->MoveNext();
|
|
}
|
|
$rs->Close();
|
|
|
|
$qid = odbc_columns($this->_connectionID,$q,$o,strtoupper($table),'%');
|
|
*/
|
|
$savem = $ADODB_FETCH_MODE;
|
|
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
|
|
$qid = odbc_columns($this->_connectionID);
|
|
$rs = new ADORecordSet_odbc($qid);
|
|
$ADODB_FETCH_MODE = $savem;
|
|
|
|
if (!$rs) return false;
|
|
|
|
$rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
|
|
|
|
$retarr = array();
|
|
while (!$rs->EOF) {
|
|
//print_r($rs->fields);
|
|
if (strtoupper($rs->fields[2]) == $table) {
|
|
$fld = new ADOFieldObject();
|
|
$fld->name = $rs->fields[3];
|
|
$fld->type = $this->ODBCTypes($rs->fields[4]);
|
|
$fld->max_length = $rs->fields[7];
|
|
$retarr[strtoupper($fld->name)] = $fld;
|
|
} else if (sizeof($retarr)>0)
|
|
break;
|
|
$rs->MoveNext();
|
|
}
|
|
$rs->Close(); //-- crashes 4.03pl1 -- why?
|
|
|
|
return $retarr;
|
|
}
|
|
|
|
function Prepare($sql)
|
|
{
|
|
if (! $this->_bindInputArray) return $sql; // no binding
|
|
$stmt = odbc_prepare($this->_connectionID,$sql);
|
|
if (!$stmt) {
|
|
// print "Prepare Error for ($sql) ".$this->ErrorMsg()."<br>";
|
|
return $sql;
|
|
}
|
|
return array($sql,$stmt,false);
|
|
}
|
|
|
|
/* returns queryID or false */
|
|
function _query($sql,$inputarr=false)
|
|
{
|
|
GLOBAL $php_errormsg;
|
|
$php_errormsg = '';
|
|
$this->_error = '';
|
|
|
|
if ($inputarr) {
|
|
if (is_array($sql)) $stmtid = $sql[1];
|
|
else $stmtid = odbc_prepare($this->_connectionID,$sql);
|
|
|
|
if ($stmtid == false) {
|
|
$this->_errorMsg = $php_errormsg;
|
|
return false;
|
|
}
|
|
if (! odbc_execute($stmtid,$inputarr)) {
|
|
@odbc_free_result($stmtid);
|
|
return false;
|
|
}
|
|
|
|
} else if (is_array($sql)) {
|
|
$stmtid = $sql[1];
|
|
if (!odbc_execute($stmtid)) {
|
|
@odbc_free_result($stmtid);
|
|
return false;
|
|
}
|
|
} else
|
|
$stmtid = odbc_exec($this->_connectionID,$sql);
|
|
|
|
if ($stmtid) {
|
|
odbc_binmode($stmtid,$this->binmode);
|
|
odbc_longreadlen($stmtid,$this->maxblobsize);
|
|
}
|
|
$this->_errorMsg = $php_errormsg;
|
|
return $stmtid;
|
|
}
|
|
|
|
/*
|
|
Insert a null into the blob field of the table first.
|
|
Then use UpdateBlob to store the blob.
|
|
|
|
Usage:
|
|
|
|
$conn->Execute('INSERT INTO blobtable (id, blobcol) VALUES (1, null)');
|
|
$conn->UpdateBlob('blobtable','blobcol',$blob,'id=1');
|
|
*/
|
|
function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')
|
|
{
|
|
return $this->Execute("UPDATE $table SET $column=? WHERE $where",array($val)) != false;
|
|
}
|
|
|
|
// returns true or false
|
|
function _close()
|
|
{
|
|
$ret = @odbc_close($this->_connectionID);
|
|
$this->_connectionID = false;
|
|
return $ret;
|
|
}
|
|
|
|
function _affectedrows()
|
|
{
|
|
return odbc_num_rows($this->_queryID);
|
|
}
|
|
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------------------
|
|
Class Name: Recordset
|
|
--------------------------------------------------------------------------------------*/
|
|
|
|
class ADORecordSet_odbc extends ADORecordSet {
|
|
|
|
var $bind = false;
|
|
var $databaseType = "odbc";
|
|
var $dataProvider = "odbc";
|
|
var $useFetchArray;
|
|
var $_has_stupid_odbc_fetch_api_change;
|
|
|
|
function ADORecordSet_odbc($id)
|
|
{
|
|
global $ADODB_FETCH_MODE;
|
|
|
|
$this->fetchMode = $ADODB_FETCH_MODE;
|
|
return $this->ADORecordSet($id);
|
|
}
|
|
|
|
|
|
// returns the field object
|
|
function &FetchField($fieldOffset = -1) {
|
|
|
|
$off=$fieldOffset+1; // offsets begin at 1
|
|
|
|
$o= new ADOFieldObject();
|
|
$o->name = @odbc_field_name($this->_queryID,$off);
|
|
$o->type = @odbc_field_type($this->_queryID,$off);
|
|
$o->max_length = @odbc_field_len($this->_queryID,$off);
|
|
|
|
return $o;
|
|
}
|
|
|
|
/* Use associative array to get fields array */
|
|
function Fields($colname)
|
|
{
|
|
if ($this->fetchMode & ADODB_FETCH_ASSOC) return $this->fields[$colname];
|
|
if (!$this->bind) {
|
|
$this->bind = array();
|
|
for ($i=0; $i < $this->_numOfFields; $i++) {
|
|
$o = $this->FetchField($i);
|
|
$this->bind[strtoupper($o->name)] = $i;
|
|
}
|
|
}
|
|
|
|
return $this->fields[$this->bind[strtoupper($colname)]];
|
|
}
|
|
|
|
|
|
function _initrs()
|
|
{
|
|
global $ADODB_COUNTRECS;
|
|
$this->_numOfRows = ($ADODB_COUNTRECS) ? @odbc_num_rows($this->_queryID) : -1;
|
|
$this->_numOfFields = @odbc_num_fields($this->_queryID);
|
|
//$this->useFetchArray = $this->connection->useFetchArray;
|
|
$this->_has_stupid_odbc_fetch_api_change = $this->connection->_has_stupid_odbc_fetch_api_change;
|
|
}
|
|
|
|
function _seek($row)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// speed up SelectLimit() by switching to ADODB_FETCH_NUM as ADODB_FETCH_ASSOC is emulated
|
|
function GetArrayLimit($nrows,$offset=-1)
|
|
{
|
|
if ($offset <= 0) return $this->GetArray($nrows);
|
|
$savem = $this->fetchMode;
|
|
$this->fetchMode = ADODB_FETCH_NUM;
|
|
$this->Move($offset);
|
|
$this->fetchMode = $savem;
|
|
|
|
if ($this->fetchMode & ADODB_FETCH_ASSOC) {
|
|
$this->fields = $this->GetRowAssoc(ADODB_ASSOC_CASE);
|
|
}
|
|
|
|
$results = array();
|
|
$cnt = 0;
|
|
while (!$this->EOF && $nrows != $cnt) {
|
|
$results[$cnt++] = $this->fields;
|
|
$this->MoveNext();
|
|
}
|
|
|
|
return $results;
|
|
}
|
|
|
|
|
|
function MoveNext()
|
|
{
|
|
if ($this->_numOfRows != 0 && !$this->EOF) {
|
|
$this->_currentRow++;
|
|
$row = 0;
|
|
if ($this->_has_stupid_odbc_fetch_api_change)
|
|
$rez = odbc_fetch_into($this->_queryID,$this->fields,$row);
|
|
else
|
|
$rez = odbc_fetch_into($this->_queryID,$row,$this->fields);
|
|
if ($rez) {
|
|
if ($this->fetchMode & ADODB_FETCH_ASSOC) {
|
|
$this->fields = $this->GetRowAssoc(ADODB_ASSOC_CASE);
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
$this->EOF = true;
|
|
return false;
|
|
}
|
|
|
|
function _fetch()
|
|
{
|
|
$row = 0;
|
|
|
|
/* code doesn't work - odbc_fetch_array undefined - why ??
|
|
if ($this->useFetchArray) {
|
|
if ($this->fetchMode & ADODB_FETCH_ASSOC) {
|
|
$this->fields = odbc_fetch_array($this->_queryID);
|
|
return is_array($this->fields);
|
|
} else {
|
|
|
|
if ($this->_has_stupid_odbc_fetch_api_change)
|
|
return odbc_fetch_into($this->_queryID,$this->fields,$row);
|
|
else
|
|
return odbc_fetch_into($this->_queryID,$row,$this->fields);
|
|
}
|
|
}
|
|
*/
|
|
if ($this->_has_stupid_odbc_fetch_api_change)
|
|
$rez = odbc_fetch_into($this->_queryID,$this->fields,$row);
|
|
else
|
|
$rez = odbc_fetch_into($this->_queryID,$row,$this->fields);
|
|
|
|
if ($rez) {
|
|
if ($this->fetchMode & ADODB_FETCH_ASSOC) {
|
|
$this->fields = $this->GetRowAssoc(ADODB_ASSOC_CASE);
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function _close() {
|
|
|
|
return @odbc_free_result($this->_queryID);
|
|
}
|
|
|
|
}
|
|
|
|
?>
|