Get the last error message string of a connection
(PHP 4 >= 4.2.0, PHP 5)
string pg_last_error ( [resourceconnection] )
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.
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().
Return Values
A string containing the last error message on the
given connection, or FALSE on error.