PGSQL_DML_NO_CONV

PGSQL_DML_NO_CONV is one of the accepted parameters for pg_select parameter #4 (optionally as a bitmask).

PGSQL_DML_NO_CONV — Passed to pg_insert, pg_select, pg_update and pg_delete. All parameters passed as is. Manual escape is required if parameters contain user supplied data. Use pg_escape_string for it.

PGSQL_DML_NO_CONV = 256;