The 5th Annual China PHP Conference


(PHP 4, PHP 5, PHP 7)

fdf_get_valueOttiene il valore di un campo


string fdf_get_value ( resource $fdf_document , string $fieldname [, int $which ] )

La funzione fdf_get_value() restituisce il valore per il campo fieldname richiesto.

Gli elementi di una matrice di campi possono essere recuperati passando il parametro opzionale which, iniziando da zero. Per i campi non matrice il parametro which viene ignorato.


Il supporto delle matrici ed il campo opzionale which sono stati aggiunti in PHP 4.3.

Vedere anche fdf_set_value().

add a note add a note

User Contributed Notes 1 note

mclinden at informed dot net
14 years ago
(i filed a bug report/feature request for this on and assigned it to myself

The default behavior for the FDF Toolkit is to return an FDFErcNoValue for the FDFGetValue when the field exists but has no value.

Whether or not this is truly an error is debateable. It seems to become an issue in documents created by Acrobat 5 when optional fields are included in a form with required fields since the default behavior seems to be to populate the HTTP_FDF_DATA with the results of the FDFNextFieldName enumerator, which would include the fields which have no value.

This would not be a problem except that the PHP function fdf_get_value() does not specifically test for the FDFErcNoValue condition but, instead, tests for the more general FDFErcOK. If this value is not the result of the error code, the system issues warnings (the display of which could be turned off), but the broader question is, should this be a warning condition at all?

Put another way, should a return of FDFErcNoValue for FDFGetValue be considered an event worth generating a warning?
To Top