Split PDF to individual pages using FPDI and FPDF

gistfile1.php

<?php

/**
 * Split PDF file
 *
 * <p>Split all of the pages from a larger PDF files into
 * single-page PDF files.</p>
 *
 * @package FPDF required http://www.fpdf.org/
 * @package FPDI required http://www.setasign.de/products/pdf-php-solutions/fpdi/
 * @param string $filename The filename of the PDF to split
 * @param string $end_directory The end directory for split PDF (original PDF's directory by default)
 * @return void
 */
function split_pdf($filename, $end_directory = false)
{
	require_once('fpdf/fpdf.php');
	require_once('fpdi/fpdi.php');
	
	$end_directory = $end_directory ? $end_directory : './';
	$new_path = preg_replace('/[\/]+/', '/', $end_directory.'/'.substr($filename, 0, strrpos($filename, '/')));
	
	if (!is_dir($new_path))
	{
		// Will make directories under end directory that don't exist
		// Provided that end directory exists and has the right permissions
		mkdir($new_path, 0777, true);
	}
	
	$pdf = new FPDI();
	$pagecount = $pdf->setSourceFile($filename); // How many pages?
	
	// Split each page into a new PDF
	for ($i = 1; $i <= $pagecount; $i++) {
		$new_pdf = new FPDI();
		$new_pdf->AddPage();
		$new_pdf->setSourceFile($filename);
		$new_pdf->useTemplate($new_pdf->importPage($i));
		
		try {
			$new_filename = $end_directory.str_replace('.pdf', '', $filename).'_'.$i.".pdf";
			$new_pdf->Output($new_filename, "F");
			echo "Page ".$i." split into ".$new_filename."<br />\n";
		} catch (Exception $e) {
			echo 'Caught exception: ',  $e->getMessage(), "\n";
		}
	}
}

// Create and check permissions on end directory!
split_pdf("filename.pdf", 'split/');

?>

Crazy this error with merged files. Report this case to SetaSign ou FPDF team.

The FPDF team replied

What you see is a consequence of the way FPDI works. When FPDI imports a page, it transforms it into an object (called XObject). So, when you merge 24 PDFs, you end up with a PDF that contains 24 XObjects.

Then, when you import a page from that PDF, I suppose that FPDI imports the 24 XObjects (because it doesn't know which ones are used by the imported page, and which ones are not, so it imports them all).

Olivier

Makes sense.

Humm. Yes. Report this bug to SetaSign and probably make fixed in future.