(PHP 5 >= 5.1.0)
pg_set_error_verbosity — Determines the verbosity of messages returned by pg_last_error() and pg_result_error().
$connection
   ], int $verbosity
   )Determines the verbosity of messages returned by pg_last_error() and pg_result_error().
   pg_set_error_verbosity() sets the verbosity mode, returning the connection's previous 
   setting. In PGSQL_ERRORS_TERSE mode, returned messages include severity, primary text, and 
   position only; this will normally fit on a single line. The default mode (PGSQL_ERRORS_DEFAULT)
   produces messages that include the above plus any detail, hint, or context 
   fields (these may span multiple lines). The PGSQL_ERRORS_VERBOSE mode includes all available 
   fields. Changing the verbosity does not affect the messages available from 
   already-existing result objects, only subsequently-created ones.
  
connection
       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().
      
verbosity
       The required verbosity: PGSQL_ERRORS_TERSE,
       PGSQL_ERRORS_DEFAULT
       or PGSQL_ERRORS_VERBOSE.
      
   The previous verbosity level: PGSQL_ERRORS_TERSE,
   PGSQL_ERRORS_DEFAULT
   or PGSQL_ERRORS_VERBOSE.
  
Example #1 pg_set_error_verbosity() example
<?php
  $dbconn = pg_connect("dbname=publisher") or die("Could not connect");
  if (!pg_connection_busy($dbconn)) {
      pg_send_query($dbconn, "select * from doesnotexist;");
  }
  
  pg_set_error_verbosity($dbconn, PGSQL_ERRORS_VERBOSE);
  $res1 = pg_get_result($dbconn);
  echo pg_result_error($res1);
?>