pg_last_error

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().

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().

A string containing the last error message on the given connection, or FALSE on error.

<?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);
?>

pg_result_error() -

pg_result_error_field() -