Total Network Tools 2002/NextStepPublishing-TotalNetworkTools2002-Win95.iso/Archive/Web Server/PHP.EXE/pear/DB/oci8.php

PHP Script | 2001-03-12 | 11.5 KB | 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          |
// | [e-mail] so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Authors: James L. Pine <[e-mail]>                             |
// |                                                                      |
// +----------------------------------------------------------------------+
//
// 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);
    }

    // }}}
}

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// tab-width: 4
// c-basic-offset: 4
// End:
?>