How can PHP optimize the process of creating a PDF file with thumbnail overview from a large PDF file?

To optimize the process of creating a PDF file with a thumbnail overview from a large PDF file in PHP, you can use a library like TCPDF to generate the thumbnail images and merge them into a new PDF file. This approach allows for efficient processing of large PDF files while maintaining the desired thumbnail overview. 

<?php
require_once('tcpdf_include.php');

// Create new PDF instance
$pdf = new TCPDF();

// Set PDF file to be used for thumbnail generation
$pdf->setSourceFile('large_file.pdf');

// Generate thumbnails for each page
for ($i = 1; $i <= $pdf->getNumPages(); $i++) {
    $pdf->AddPage();
    $tplIdx = $pdf->importPage($i);
    $pdf->useTemplate($tplIdx, 0, 0, 100);
}

// Output the PDF file with thumbnail overview
$pdf->Output('thumbnail_overview.pdf', 'F');
?>

Keywords

PHP PDF thumbnail optimization large file

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