Export annotations on Server/Desktop

To extract data from PDF to FDF, then export FDF as XFDF

1$doc = new PDFDoc($filename);
2
3// Extract annotations to FDF.
4// Optionally use e_both to extract both forms and annotations
5$doc_fields = $doc->FDFExtract(PDFDoc::e_annots_only); //PDFDoc::e_forms_only
6
7// Export annotations from FDF to XFDF.
8$doc_fields->SaveAsXFDF($output_xfdf_filename);
9
10// Optionally write XFDF to a string
11$XFDF_string = $doc_fields->SaveAsXFDF();

PDF Form Fill and Form Data Extraction - Full Sample
Full sample code which illustrates basic FDF merge/extract functionality and full support for FDF (Forms Data Format). Samples available in Python, C# (.Net), C++, Go, Java, Node.js (JavaScript), PHP, Ruby, VB.

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