pg_field_is_null

Description

pg_field_is_null() tests if a field in a PostgreSQL result resource is SQL NULL or not.

Parameters

Return Values

Returns 1 if the field in the given row is SQL NULL, 0 if not. FALSE is returned if the row is out of range, or upon any other error.

Examples

Example 1. pg_field_is_null() example <?php   $dbconn = pg_connect("dbname=publisher") or die ("Could not connect");   $res = pg_query($dbconn, "select * from authors where author = 'Orwell'");   if ($res) {       if (pg_field_is_null($res, 0, "year") == 1) {           echo "The value of the field year is null.\n";       }       if (pg_field_is_null($res, 0, "year") == 0) {           echo "The value of the field year is not null.\n";     } } ?>