What are some best practices for generating FDF files in PHP for PDF form filling?

When generating FDF files in PHP for PDF form filling, it is important to properly format the data in the FDF file to match the fields in the PDF form. This includes specifying the field names and corresponding values in the FDF file. Additionally, make sure to properly encode the data to ensure compatibility with the PDF form. 

<?php

// Define the field names and corresponding values
$fields = [
    'name' => 'John Doe',
    'email' => 'johndoe@example.com',
    'phone' => '123-456-7890'
];

// Generate the FDF file content
$fdf_data = "%FDF-1.2\n" .
    "1 0 obj\n" .
    "<< /FDF << /Fields [\n";

foreach ($fields as $field => $value) {
    $fdf_data .= "<< /T ($field) /V ($value) >>\n";
}

$fdf_data .= "] >> >>\n" .
    "endobj\n" .
    "trailer\n" .
    "<< /Root 1 0 R >>\n" .
    "%%EOF\n";

// Output the FDF file
header('Content-Type: application/vnd.fdf');
echo $fdf_data;

?>

Keywords

FDF files PHP PDF form filling libraries functions

Related Questions