Get the last error message string of a connection

# pg_last_error

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_last_error — Get the last error message string of a connection

### Description

pg_last_error(?PgSql\Connection `$connection` = `null`): string

pg_last_error() returns the last error message for a given `connection`.

Error messages may be overwritten by internal PostgreSQL (libpq) function calls. It may not return an appropriate error message if multiple errors occur inside a PostgreSQL module function.

Use pg_result_error(), pg_result_error_field(), pg_result_status() and pg_connection_status() for better error handling.

> Note:

> This function used to be called pg_errormessage().

### Parameters

`connection`

  An PgSql\Connection instance. When `connection` is `null`, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

  Warning

  As of PHP 8.1.0, using the default connection is deprecated.

### Return Values

A string containing the last error message on the given `connection`.

### Changelog

Version | Description
--- | ---
8.1.0 | The `connection` parameter expects an PgSql\Connection instance now; previously, a resource was expected.
8.0.0 | `connection` is now nullable.

### Examples

Example #1 pg_last_error() example

`<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
// Query that fails
$res = pg_query($dbconn, "select * from doesnotexist");
echo pg_last_error($dbconn);
?>`

### See Also

- pg_result_error() - Get error message associated with result
- pg_result_error_field() - Returns an individual field of an error report

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