About PQsetClientEncoding(),"SET NAMES",and "SET CLIENT_ENCODING"

Tatsuo Ishii wrote:

> Here are the patches I promised against PHP
> 3.0.15 or later.
>
> To set the client encoding to BIG5:
>
> pg_setclientencoding($cid, "BIG5");
>
> ($cid is the connection id)
>
> To get the current client encoding:
>
> pg_clientencoding($cid);
>
> Note that these fucntions are already included in the latest PHP4.

Thank you!
Your README.mb has been translate into Chinese (Big5 encoding) in the
attachement.
Would someone like to review it?
After translating it, I still have one question: (Sorry, I have not read the
source code.)
What is the difference among "libpq -- PQsetClientEncoding()",
"SQL command -- SET NAMES", and
"SQL command -- SET CLIENT_ENCODING"?
For example: If we use PHP (>4.0.2), which way is correct or mostly correct?

1. pg_setclientencoding($cid, "BIG5")
2. pg_exec("SET NAMES 'BIG5'")
3. pg_exec("SET CLIENT_ENCODING TO 'BIG5'")

--
Chih-Chang Hsieh