pg_field_type() returns a string containing the base type name of the given field_number in the given PostgreSQL result resource.
If the field uses a PostgreSQL domain (rather than a basic type), it is the name of the domain's underlying type that is returned, rather than the name of the domain itself.
This function used to be called pg_fieldtype().
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
// Assume 'title' is a varchar type
$res = pg_query($dbconn, "select title from authors where author = 'Orwell'");
echo "Title field type: ", pg_field_type($res, 0);
The above example will output:
Title field type: varchar