IMO it would be helpful if pg_meta_data() could also return the dimension of an array if one uses this feature of postgres:

diff -u php4-4.3.0-compiled/ext/pgsql/pgsql.c php4-4.3.0/ext/pgsql/pgsql.c
--- php4-4.3.0-compiled/ext/pgsql/pgsql.c       2002-12-21 18:46:32.000000000 +0100
+++ php4-4.3.0/ext/pgsql/pgsql.c        2003-02-16 14:57:10.000000000 +0100
@@ -3078,7 +3078,7 @@
        zval *elem;

        smart_str_appends(&querystr,
-                       "SELECT a.attname, a.attnum, t.typname, a.attlen, a.attnotNULL, a.atthasdef "
+                       "SELECT a.attname, a.attnum, t.typname, a.attlen, a.attnotNULL, a.atthasdef, a.attndims "
                        "FROM pg_class as c, pg_attribute a, pg_type t "
                        "WHERE a.attnum > 0 AND a.attrelid = c.oid AND c.relname = '");

@@ -3117,6 +3117,7 @@
                else {
                        add_assoc_bool(elem, "has default", 0);
                }
+               add_assoc_long(elem, "array dims", atoi(PQgetvalue(pg_result,i,6)));
                name = PQgetvalue(pg_result,i,0);
                add_assoc_zval(meta, name, elem);
        }