pg_last_notice() returns the
last notice message from the PostgreSQL server specified by
connection. The PostgreSQL
server sends notice messages in several cases, e.g. if the
transactions can't be continued. With
pg_last_notice(), you can avoid issuing useless queries,
by checking whether the notice is related to the transaction
or not.
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Notice message tracking can be set to optional by
setting 1 for pgsql.ignore_notice
ini from PHP 4.3.0.
Notice message logging can be set to optional by setting
0 for pgsql.log_notice ini from PHP
4.3.0. Unless pgsql.ignore_notice is
set to 0, notice message cannot be logged.
See also pg_query() and
pg_last_error().