What potential pitfalls should be considered when trying to merge PDF files using TCPDF in PHP?

When merging PDF files using TCPDF in PHP, potential pitfalls to consider include memory usage, file size limitations, and potential conflicts with existing PDF settings. To address these issues, it is important to optimize memory usage by clearing variables and objects after each PDF is processed, ensure that the merged PDF does not exceed server limitations, and carefully configure TCPDF settings to prevent conflicts. 

// Example PHP code snippet for merging PDF files using TCPDF with memory optimization

// Initialize TCPDF
require_once('tcpdf_include.php');
$pdf = new TCPDF();

// Merge PDF files
$pdf->setSourceFile('file1.pdf');
$tplIdx1 = $pdf->importPage(1);
$pdf->AddPage();
$pdf->useTemplate($tplIdx1);

$pdf->setSourceFile('file2.pdf');
$tplIdx2 = $pdf->importPage(1);
$pdf->AddPage();
$pdf->useTemplate($tplIdx2);

// Clear variables and objects to optimize memory usage
unset($tplIdx1);
unset($tplIdx2);

// Output merged PDF
$pdf->Output('merged_files.pdf', 'I');

Keywords

TCPDF merge PDF files PHP potential errors file size limit

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