pg_set_client_encoding() sets the client encoding and return 0 if success or -1 if error.
encoding is the client encoding and can be either : SQL_ASCII, EUC_JP, EUC_CN, EUC_KR, EUC_TW, UNICODE, MULE_INTERNAL, LATINX (X=1...9), KOI8, WIN, ALT, SJIS, BIG5, WIN1250. Available encoding depends on your PostgreSQL and libpq version. Refer to PostgreSQL manual for supported encodings for your PostgreSQL.
Note: This function requires PHP-4.0.3 or higher and PostgreSQL-7.0 or higher. Supported encoding depends on PostgreSQL version. Refer to PostgreSQL manual for details.
The function used to be called pg_setclientencoding().
See also pg_client_encoding().