PHP developers on Windows can use the odbtp driver instead of the odbc,
ado and mssql drivers. The odbtp extension provides better performance and
more capabities than the extensions used by the other drivers. For example,
Microsoft Access and Microsoft SQL Server can store UNICODE text data.
However, the odbtp driver is the only one that provides full support for
UNICODE text data and queries. The odbtp driver also has the exact behaviour
on both Win32 and non-Win32 installations.
Requirements
The DB_odbtp package requires the prior installation of the ODBTP
PHP extension and Win32 service. These components can be obtained
at http://odbtp.sourceforge.net.
The ODBTP service must be installed on a WinNT, WinXP or Win2K host whose
ODBC facilities can access the desired database. The ODBTP extension and
DB_odbtp package can be installed on any computer that can connect to the
ODBTP service.
DSN specification
Full specification:
odbtp(dbsyntax)://username:password@hostspec:port/database?opt1=val1&opt2=val2...&optN=valNMinimal specification:
odbtp://hostspecThe
dbsyntax
option can be any one of the following values:
access
-- Microsoft Access
db2
-- IBM DB2
dsn
-- General ODBC DSN
excel
-- Microsoft Excel
mssql
-- Microsoft SQL Server
mysql
-- MySQL
oracle
-- Oracle
sybase
-- Sybase
text
-- Text Files
vfp
-- Visual FoxPro
The hostspec
option can either be the hostname or IP address
of an ODBTP service, or it can be the name of an
ODBTP interface.
In the case of the minimal specification, hostspec
must be the
name of an interface. The default value for hostspec
is
127.0.0.1
.
For more details about PEAR DB's DSN specification, see
Introduction - DSN
from the PEAR Manual.
ODBTP options
Name | Description |
connid |
ODBTP connection Id. This is only required when reconnecting to a reserved connection. |
conntimeout |
ODBTP TCP/IP connection timeout in seconds. |
conntype |
ODBTP connection type. it can either be single ,
reserved or normal . The default is
normal .
|
dbparam |
The name of the ODBC connect string parameter for specifying the database.
The value is ODBC driver dependent. Examples are DATABASE ,
DBQ , SOURCEDB and DSN . The default
is DATABASE .
|
odbcport |
The ODBC connect string PORT parameter value. This
option is included to eliminate ambiguity with the PEAR DB DSN's
port option.
|
odbcprotocol |
The ODBC connect string PROTOCOL parameter value. This
option is included to eliminate ambiguity with the PEAR DB DSN's
protocol option.
|
readtimeout |
ODBTP TCP/IP read timeout in seconds. |
rowcache |
Enable row caching. If set to yes , then all row data will be
placed in memory immediately after quere execution. This allows
predetermination of row counts, and backward fetches without having to
use a cursor.
|
txnisol |
Transaction isolation level to use when auto commit has been disabled.
Valid values are ReadUncommitted , ReadCommitted ,
RepeatableRead , Serializable and
Default .
|
unicode |
Enable UNICODE query text processing. If set to yes , then all
query text will be read as UTF-8 encoded UNICODE text. And, if the underlying
database is Microsoft Access, all text data will be returned as UTF-8 encoded
UNICODE text.
|
vardatasize |
Sets the maximum allowed byte size for variable length data, i.e., CLOBs (text) and BLOBs (image). The default is 64KB. |
Database | Additionally defined options and their defaults | |
'dbparam' => 'DBQ' 'driver' => '{Microsoft Access Driver (*.mdb)}' 'username' => 'admin' 'password' => '' | ||
'dbparam' => 'DATABASE' 'driver' => '{IBM DB2 ODBC Driver}' 'hostname' => 'localhost' 'odbcport' => '50000' 'odbcprotocol' => 'TCPIP' | ||
'dbparam' => 'DSN' | ||
'dbparam' => 'DBQ' 'driver' => '{Microsoft Excel Driver (*.xls)}' 'driverid' => '790' | ||
'dbparam' => 'DATABASE' 'driver' => '{SQL Server}' 'server' => '(local)' | ||
'dbparam' => 'DATABASE' 'driver' => '{mySQL}' 'server' => 'localhost' 'odbcport' => '3306' 'option' => '131072' 'stmt' => '' | ||
'dbparam' => 'DBQ' 'driver' => '{Oracle ODBC Driver}' | ||
'dbparam' => 'DATABASE' 'driver' => '{Sybase ASE ODBC Driver}' 'srvr' => 'localhost' | ||
'dbparam' => 'DBQ' 'driver' => '{Microsoft Text Driver (*.txt; *.csv)}' 'extensions' => 'asc,csv,tab,txt' | ||
'dbparam' => 'SOURCEDB' 'driver' => '{Microsoft Visual FoxPro Driver}' 'sourcetype' => 'DBF' 'exclusivee' => 'NO' |
$dsn = 'odbtp(mssql)://myuid:mypwd@odbtp.someehere.com/mydb?server=myserver';B. MS SQL Server and ODBTP server on same host.
$dsn = 'odbtp(mssql)://myuid:mypwd@myserver/mydb';C. PHP not on same host as MS Access database and ODBTP server.
$dsn = 'odbtp(access)://207.66.121.4/c:\somepath\mydb.mdb';D. PHP, MS Access database and ODBTP server on same host. UNICODE support enabled.
$dsn = 'odbtp(access):///c:\somepath\mydb.mdb?unicode=yes';E. An ODBTP server that does not listen on port 2799, the default.
$dsn = 'odbtp(access)://207.66.121.4:7255/c:\somepath\mydb.mdb';F. MS Excel spreadsheet on remote ODBTP server.
$dsn = 'odbtp(excel)://odbtp.somewhere.com/c:\somepath\mysheet.xls';G. Text files on local ODBTP server. Row cache enabled.
$dsn = 'odbtp(text):///c:\PathToTextFiles?rowcache=yes';H. Visual FoxPro database on remote ODBTP server.
$dsn = 'odbtp(vfp)://207.66.121.4/c:\PathToDBFs';I. Visual FoxPro DBC on local ODBTP server.
$dsn = 'odbtp(vfp):///c:\somepath\mydb.dbc?sourcetype=DBC';J. DSN array for Sybase. Connection type set to single.
$dsn = array( 'phptype' => 'odbtp', 'dbsyntax' => 'sybase', 'hostspec' => 'odbtp.somewhere.com', 'username' => 'myuid', 'password' => 'mypwd', 'database' => 'mydb', 'srvr' => 'mysrvr', 'conntype' => 'single' );K. IBM DB2 not listening on port 50000, the default.
$dsn = 'odbtp(db2)://myuid:mypwd@207.66.121.4/mydb?odbcport=51000';L. Connection to Oracle. ODBTP read timeout set to 300 seconds
$dsn = 'odbtp(oracle)://myuid:mypwd@odbtp.someehere.com/mydb?readtimeout=300';M. General ODBC DSN on locat ODBTP server.
$dsn = 'odbtp(dsn):///mydsn';N. Connecting with an ODBTP interface.
$dsn = 'odbtp://myinterface';O. Database for which a dbsyntax value has not been defined.
$dsn = array( 'phptype' => 'odbtp', 'driver' => '{INTERSOLV InterBase ODBC Driver (*.gdb)}', 'hostspec' => '207.66.121.4', 'server' => 'localhost', 'username' => 'myuid', 'password' => 'mypwd', 'database' => 'localhost:C:\Home\Data\Mydb.gdb', 'dbparam' => 'DATABASE' );