PostgreSQL supports automatic character set conversion between
server and client for certain character sets.
pg_client_encoding() returns the client
encoding as a string. The returned string will be one of the
standard PostgreSQL encoding identifiers.
Note:
This function requires PHP 4.0.3 or higher and PostgreSQL 7.0 or
higher. If libpq is compiled without multibyte encoding support,
pg_client_encoding() always returns
SQL_ASCII. Supported encoding depends on PostgreSQL
version. Refer to the PostgreSQL Documentation supported encodings.
PostgreSQL database connection resource. When
connection is not present, the default connection
is used. The default connection is the last connection made by
pg_connect() or pg_pconnect().