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# fdf_next_field_name

(PHP 3>= 3.0.6, PHP 4 )

fdf_next_field_name -- Get the next field name

## Description

string fdf_next_field_name ( resource fdf_document [, string fieldname])

The fdf_next_field_name() function returns the name of the field after the field in `fieldname` or the field name of the first field if the second parameter is `NULL`.

Example 1. Detecting all fieldnames in a FDF
    <?php
      $fdf = fdf_open($HTTP_FDF_DATA);
      for($field = fdf_next_field_name($fdf);
         $field != "";
         $field = fdf_next_field_name($fdf, $field)) {
        echo "field: $field\n";
      }
    ?>

See also fdf_enum_fields() and fdf_get_value().

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