(PHP 4, PHP 5 < 5.3.0)
msql_field_flags — Get field flags
$result
   , int $field_offset
   ) : stringmsql_field_flags() returns the field flags of the specified field.
resultThe result resource that is being evaluated. This result comes from a call to msql_query().
field_offsetThe numerical field offset. The
field_offset starts at 1.
   Returns a string containing the field flags of the specified key.
   This can be: primary key not null,
   not null, primary key, 
   unique not null or unique.