Gets a value - Справочник: PHP5.4

float px_get_value ( resource $pxdoc , string $name )

Gets various values.

pxdoc

Resource identifier of the paradox database as returned by px_new().

name

name can be one of the following.

numprimkeys: The number of primary keys. Paradox databases always use the first numprimkeys fields for the primary index.

Returns the value of the parameter или FALSE в случае возникновения ошибки.