Description:
------------
                                                                                                     I am unable to get pg_field_size to return the correct storage size of a field; I have pg_field_num and pg_field_type working but not pg_field_size.

Reproduce code:
---------------
<?php
//  get fields sizes for currency file $dbconn_str = "host=localhost port=5432 dbname=pacs user=YYY password=XXXX";
if ( $dbconn = pg_connect($dbconn_str) ) {
  if ( !$db_status = pg_connection_status($dbconn) ) {
    $res = pg_query($dbconn, "select * from ccy limit 1");     $ccy_code_fnr = pg_field_num($res, "ccy_code");
    $ccy_code_type = pg_field_type($res, $ccy_code_fnr);
    $ccy_code_size = pg_field_size($res, $ccy_code_fnr);
    echo "res:", $res, " code:", $ccy_code_fnr, " type:", $ccy_code_type, " size:", $ccy_code_size; 
?>

Expected result:
----------------
res:Resource id #3 code:0 type:bpchar size:-1

Actual result:
--------------
res:Resource id #3 code:0 type:bpchar size:6

since psql gives:-

pacs=# \d ccy
            Table "public.ccy"
    Column     |     Type      | Modifiers
---------------+---------------+-----------
 ccy_code      | character(6)  | not null
 ccy_desc      | character(20) |
 ccy_curr_rate | numeric(12,4) |
 ccy_std_rate  | numeric(12,4) |
 ccy_alt_rate  | numeric(12,4) |
Indexes: ccy_pkey primary key btree (ccy_code)
 
pacs=#