使用pdo_dblib连接到sybase失败

Question

I want to use PDO to connect to a Sybase using PHP pdo_dblib . This is what I have done:

$conn = new PDO("dblib:host=$db_host:$db_port;dbname=$db_name","$login","$password"); 

It shows me SQL Null error . I don't know how to get it right. I have checked the php info, and the pdo_dblib is there.

PDO Driver for FreeTDS/Sybase DB-lib: Flavour
enabled: freetds

by the way, is the database port needed? Before this, I didn't put the database port number, plus now I'm still unable to get the port number.

Answer 1

Follow these steps to find the cause of the error

Step1: Connecting using telnet.

xxx@ubuntuvbox:~$ telnet 10.1.1.1 5000
Trying 10.1.1.1...
Connected to 10.1.1.1.

Step2: Configure FreeTDS

Edit freetds.conf, located in /etc/freetds/ (Ubuntu 11.10)

[global]
    # TDS protocol version
    tds version = 5.0
    text size = 64512

Step3: Connecting using FreeTDS

xxx@ubuntuvbox:~$ sqsh -S 10.1.1.1:5000 -Usa
sqsh-2.1 Copyright (C) 1995-2001 Scott C. Gray
This is free software with ABSOLUTELY NO WARRANTY
For more information type '\warranty'
Password: 
Msg 2401, Level 11, State 2
Server 'XXXXXX'
Character set conversion is not available between client character set 'utf8'
and server character set 'cp850'.
No conversions will be done.
1> select * from .....

Step4: Connecting using FreeTDS with PHP

Check this...

$dbh = new PDO ('dblib:host=10.1.1.1:5000;dbname=databasename','sa','password');