(Perl) PDF List Unsigned Signature Fields

See more PDF Signatures Examples

Demonstrates how to list the unsigned signature fields in a PDF.

Note: This example requires Chilkat v9.5.0.90 or greater.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$pdf = chilkat::CkPdf->new();

# Load a PDF containing 2 remaining unsigned signature fields:
$success = $pdf->LoadFile("qa_data/pdf/doctor_patient_parent.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

# Note: This example requires Chilkat v9.5.0.90 or greater.
$json = chilkat::CkJsonObject->new();
$pdf->GetUnsignedSigFields($json);

$json->put_EmitCompact(0);
print $json->emit() . "\r\n";

# Result:
# {
#   "unsignedSigField": [
#     "doctor_signature",
#     "parent_signature"
#   ]
# }

# To iterate over the field names:

$i = 0;
$count_i = $json->SizeOfArray("unsignedSigField");
while ($i < $count_i) {
    $json->put_I($i);
    $strVal = $json->stringOf("unsignedSigField[i]");
    print $strVal . "\r\n";
    $i = $i + 1;
}