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oci8.php
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PHP Script
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2001-03-12
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470 lines
<?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: James L. Pine <jlp@valinux.com> |
// | |
// +----------------------------------------------------------------------+
//
// Database independent query interface definition for PHP's Oracle 8
// call-interface extension.
//
//
// be aware... OCIError() only appears to return anything when given a
// statement, so functions return the generic DB_ERROR instead of more
// useful errors that have to do with feedback from the database.
//
require_once 'DB/common.php';
class DB_oci8 extends DB_common
{
// {{{ properties
var $connection;
var $phptype, $dbsyntax;
var $manip_query = array();
var $prepare_types = array();
var $autoCommit = 1;
var $last_stmt = false;
// }}}
// {{{ constructor
function DB_oci8()
{
$this->DB_common();
$this->phptype = 'oci8';
$this->dbsyntax = 'oci8';
$this->features = array(
'prepare' => false,
'pconnect' => true,
'transactions' => true
);
$this->errorcode_map = array();
}
// }}}
// {{{ connect()
/**
* Connect to a database and log in as the specified user.
*
* @param $dsn the data source name (see DB::parseDSN for syntax)
* @param $persistent (optional) whether the connection should
* be persistent
*
* @return int DB_OK on success, a DB error code on failure
*/
function connect($dsn, $persistent = false)
{
if (is_array($dsn)) {
$dsninfo = &$dsn;
} else {
$dsninfo = DB::parseDSN($dsn);
}
if (!$dsninfo || !$dsninfo['phptype']) {
return $this->raiseError();
}
$this->dsn = $dsninfo;
$user = $dsninfo['username'];
$pw = $dsninfo['password'];
$hostspec = $dsninfo['hostspec'];
DB::assertExtension("oci8");
$connect_function = $persistent ? 'OCIPLogon' : 'OCILogon';
if ($hostspec) {
$conn = @$connect_function($user,$pw,$hostspec);
} elseif ($user || $pw) {
$conn = @$connect_function($user,$pw);
} else {
$conn = false;
}
if ($conn == false) {
return $this->raiseError();
}
$this->connection = $conn;
return DB_OK;
}
// }}}
// {{{ disconnect()
/**
* Log out and disconnect from the database.
*
* @return bool TRUE on success, FALSE if not connected.
*/
function disconnect()
{
return @OCILogOff($this->connection);
}
// }}}
// {{{ simpleQuery()
/**
* Send a query to oracle and return the results as an oci8 resource
* identifier.
*
* @param $query the SQL query
*
* @return int returns a valid oci8 result for successful SELECT
* queries, DB_OK for other successful queries. A DB error code
* is returned on failure.
*/
function simpleQuery($query)
{
$this->last_query = $query;
$query = $this->modifyQuery($query);
$result = @OCIParse($this->connection, $query);
if (!$result) {
return $this->raiseError();
}
if ($this->autoCommit) {
$success = @OCIExecute($result,OCI_COMMIT_ON_SUCCESS);
}
else {
$success = @OCIExecute($result,OCI_DEFAULT);
}
if (!$success) {
return $this->raiseError();
}
$this->last_stmt=$result;
// 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 oci8 result identifier
* @param $fetchmode how the resulting array should be indexed
*
* @return int an array on success, a DB error code on failure, NULL
* if there is no more data
*/
function &fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT)
{
if ($fetchmode == DB_FETCHMODE_DEFAULT) {
$fetchmode = $this->fetchmode;
}
if ($fetchmode & DB_FETCHMODE_ASSOC) {
$moredata = @OCIFetchInto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS + OCI_RETURN_LOBS);
} else {
$moredata = @OCIFetchInto($result, $row, OCI_RETURN_NULLS + OCI_RETURN_LOBS);
}
if (!$row) {
return $this->raiseError();
}
if ($moredata == NULL) {
return NULL;
}
return $row;
}
// }}}
// {{{ fetchInto()
/**
* Fetch a row and insert the data into an existing array.
*
* @param $result oci8 result identifier
* @param $arr (reference) array where data from the row is stored
* @param $fetchmode how the array data should be indexed
*
* @return int DB_OK on success, a DB error code on failure
*/
function fetchInto($result, &$arr, $fetchmode = DB_FETCHMODE_DEFAULT)
{
if ($fetchmode == DB_FETCHMODE_DEFAULT) {
$fetchmode = $this->fetchmode;
}
if ($fetchmode & DB_FETCHMODE_ASSOC) {
$moredata = @OCIFetchInto($result,$arr,OCI_ASSOC+OCI_RETURN_NULLS+OCI_RETURN_LOBS);
} else {
$moredata = @OCIFetchInto($result,$arr,OCI_RETURN_NULLS+OCI_RETURN_LOBS);
}
if (!($arr && $moredata)) {
return $this->raiseError();
}
return DB_OK;
}
// }}}
// {{{ freeResult()
/**
* Free the internal resources associated with $result.
*
* @param $result oci8 result identifier or DB statement identifier
*
* @return bool TRUE on success, FALSE if $result is invalid
*/
function freeResult($result)
{
if (is_resource($result)) {
return @OCIFreeStatement($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 oci8 result identifier
*
* @return int the number of columns per row in $result
*/
function numCols($result)
{
$cols = @OCINumCols($result);
if (!$cols) {
return $this->raiseError();
}
return $cols;
}
// }}}
// {{{ errorNative()
/**
* Get the native error code of the last error (if any) that occured
* on the current connection. This does not work, as OCIError does
* not work unless given a statement. If OCIError does return
* something, so will this.
*
* @return int native oci8 error code
*/
function errorNative()
{
$error = @OCIError($this->connection);
if (is_array($error)) {
return $error['code'];
}
return false;
}
// }}}
// {{{ prepare()
/**
* Prepares a query for multiple execution with execute(). With
* oci8, this is emulated.
* @param $query query to be prepared
*
* @return DB statement resource
*/
function prepare($query)
{
$tokens = split('[\&\?]', $query);
$token = 0;
$types = array();
for ($i = 0; $i < strlen($query); $i++) {
switch ($query[$i]) {
case '?':
$types[$token++] = DB_PARAM_SCALAR;
break;
case '&':
$types[$token++] = DB_PARAM_OPAQUE;
break;
}
}
$binds = sizeof($tokens) - 1;
for ($i = 0; $i < $binds; $i++) {
$newquery .= $tokens[$i] . ":bind" . $i;
}
$newquery .= $tokens[$i];
$this->last_query = $query;
$newquery = $this->modifyQuery($newquery);
$stmt = @OCIParse($this->connection, $newquery);
$this->prepare_types[$stmt] = $types;
$this->manip_query[$stmt] = DB::isManip($query);
return $stmt;
}
// }}}
// {{{ execute()
/**
* Executes a DB statement prepared with prepare().
*
* @param $stmt a DB statement resource (returned from prepare())
* @param $data data to be used in execution of the statement
*
* @return int returns an oci8 result resource for successful
* SELECT queries, DB_OK for other successful queries. A DB error
* code is returned on failure.
*/
function execute($stmt, $data = false)
{
$types=&$this->prepare_types[$stmt];
if (($size=sizeof($types))!=sizeof($data)) {
return $this->raiseError();
}
for ($i=0;$i<$size;$i++) {
if (is_array($data)) {
$pdata[$i]=$data[$i];
}
else {
$pdata[$i]=$data;
}
if ($types[$i]==DB_PARAM_OPAQUE) {
$fp = fopen($pdata[$i], "r");
$pdata = '';
if ($fp) {
while (($buf = fread($fp, 4096)) != false) {
$pdata[$i] .= $buf;
}
}
}
if (!@OCIBindByName($stmt,":bind".$i,$pdata[$i],-1)) {
return $this->raiseError();
}
}
if ($this->autoCommit) {
$success = @OCIExecute($stmt,OCI_COMMIT_ON_SUCCESS);
}
else {
$success = @OCIExecute($stmt,OCI_DEFAULT);
}
if (!$success) {
return $this->raiseError();
}
$this->last_stmt=$stmt;
if ($this->manip_query[$stmt]) {
return $DB_OK;
} else {
return $stmt;
}
}
// }}}
// {{{ autoCommit()
/**
* Enable/disable automatic commits
*
* @param $onoff true/false whether to autocommit
*/
function autoCommit($onoff = false)
{
if (!$onoff) {
$this->autoCommit = 0;
}
else {
$this->autoCommit = 1;
}
return DB_OK;
}
// }}}
// {{{ commit()
/**
* Commit transactions on the current connection
*
* @return DB_ERROR or DB_OK
*/
function commit()
{
$result = @OCICommit($this->connection);
if (!$result) {
return $this->raiseError();
}
return DB_OK;
}
// }}}
// {{{ rollback()
/**
* Roll back all uncommitted transactions on the current connection.
*
* @return DB_ERROR or DB_OK
*/
function rollback()
{
$result = @OCIRollback($this->connection);
if (!$result) {
return $this->raiseError();
}
return DB_OK;
}
// }}}
// {{{ affectedRows()
/**
* Gets the number of rows affected by the last query.
* if the last query was a select, returns 0.
*
* @return number of rows affected by the last query or DB_ERROR
*/
function affectedRows()
{
if ($this->last_stmt === false) {
return $this->raiseError();
}
$result = @OCIRowCount($this->last_stmt);
if ($result === false) {
return $this->raiseError();
}
return $result;
}
// }}}
// {{{ modifyQuery()
function modifyQuery($query)
{
// "SELECT 2+2" must be "SELECT 2+2 FROM dual" in Oracle
if (preg_match('/^\s*SELECT/i', $query) &&
!preg_match('/\sFROM\s/i', $query)) {
$query .= " FROM dual";
}
return $query;
}
// }}}
// {{{ quoteString()
function quoteString($string)
{
return str_replace("'", "''", $string);
}
// }}}
}
// Local variables:
// tab-width: 4
// c-basic-offset: 4
// End:
?>