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# pg_result_error_field

(PHP 5 >= 5.1.0RC1)

pg_result_error_field -- Returns an individual field of an error report.

## Descrizione

string pg_result_error_field ( resource result, int fieldcode )

pg_result_error_field() returns one of the detailed error message fields associated with result resource. It is only available against a PostgreSQL 7.4 or above server. The error field is specified by the fieldcode.

Because pg_query() and pg_query_params() return `FALSE` if the query fails, you must use pg_send_query() and pg_get_result() to get the result handle.

If you need to get additional error information from failed pg_query() queries, use pg_set_error_verbosity() and pg_last_error() and then parse the result.

## Elenco dei parametri

result

  A PostgreSQL query result resource from a previously executed statement.

fieldcode

  Possible fieldcode values are: `PGSQL_DIAG_SEVERITY`, `PGSQL_DIAG_SQLSTATE`, `PGSQL_DIAG_MESSAGE_PRIMARY`, `PGSQL_DIAG_MESSAGE_DETAIL`, `PGSQL_DIAG_MESSAGE_HINT`, `PGSQL_DIAG_STATEMENT_POSITION`, `PGSQL_DIAG_INTERNAL_POSITION` (PostgreSQL 8.0+ only), `PGSQL_DIAG_INTERNAL_QUERY` (PostgreSQL 8.0+ only), `PGSQL_DIAG_CONTEXT`, `PGSQL_DIAG_SOURCE_FILE`, `PGSQL_DIAG_SOURCE_LINE` or `PGSQL_DIAG_SOURCE_FUNCTION`.

## Valori restituiti

A string containing the contents of the error field, `NULL` if the field does not exist or `FALSE` on failure.

## Esempi

Esempio 1. pg_result_error_field() example

`<?php $dbconn = pg_connect("dbname=publisher") or die("Could not connect"); if (!pg_connection_busy($dbconn)) { pg_send_query($dbconn, "select * from doesnotexist;"); } $res1 = pg_get_result($dbconn); echo pg_result_error_field($res1, PGSQL_DIAG_SQLSTATE); ?>`

## Vedere anche:

pg_result_error()

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pg_query | Risali | pg_result_error