px_get_schema() returns the database schema.
pxdocResource identifier of the paradox database as returned by px_new().
mode
If the optional mode is
PX_KEYTOLOWER or
PX_KEYTOUPPER the keys of the returned array
will be converted to lower
or upper case. If mode is 0 or not passed at all,
then the key name will be identical to the field name.
Returns the schema of a database file as an associated array. The key name is equal to the field name. Each array element is itself an associated array containing the two fields type and size. type is one of the constants in table Constants for field types. size is the number of bytes this field consumes in the record. The total of all field sizes is equal to the record size as it can be retrieved with px-get-info().