Here’s an example of how you could create a simple PDF with layers using PHP and the FPDF
library:
- Frontend:
- Create a web page with radio buttons or drop-down selections for the user to choose the layers they want to include in the PDF.
- Use JavaScript to collect the user’s selections and send them to the server as a JSON object (using AJAX or by submitting a form).
- Backend (PHP):
- Receive the user’s selections.
- Use the
FPDF
library to create a new PDF document.
- Add the selected layers to the PDF document based on the user’s selections. Each layer could be a separate image or PDF file that you overlay on the main PDF document.
- Output the PDF to the user’s browser as a downloadable file or display it in an embedded PDF viewer on the web page.
Here is an example of a PHP script using the FPDF
library to create a simple PDF with layers:
require('fpdf.php');
// Define the layers
$layer1 = "Layer 1 content";
$layer2 = "Layer 2 content";
$layer3 = "Layer 3 content";
// Get user's selections (for example, from a JSON object)
$user_selections = array(
"layer1" => true,
"layer2" => false,
"layer3" => true
);
// Create a new PDF
$pdf = new FPDF();
$pdf->AddPage();
// Add the selected layers to the PDF
if ($user_selections["layer1"]) {
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(40, 10, $layer1);
$pdf->Ln();
}
if ($user_selections["layer2"]) {
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(40, 10, $layer2);
$pdf->Ln();
}
if ($user_selections["layer3"]) {
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(40, 10, $layer3);
$pdf->Ln();
}
// Output the PDF to the browser
$pdf->Output();
In this example, we define three layers as strings and get the user’s selections in an associative array. We then create a new PDF using the FPDF
library and add the selected layers to the PDF based on the user’s selections. Finally, we output the PDF to the browser. You can then send this file to the user’s browser for download or display it in an embedded PDF viewer on the web page.
Note that this is just a simple example to give you an idea of how you could implement this functionality using PHP. In a real-world scenario, you would need to handle more complex layers (e.g., images or other PDF files), error handling, and user input validation.