How can the 'F' and 'I' parameters in the TCPDF Output function affect the display of PDF files on a website?

The 'F' parameter in the TCPDF Output function determines whether the PDF file is saved to a file or sent to the browser. Setting it to 'F' will save the file, while setting it to 'I' will send it to the browser for display. If the 'I' parameter is used, the browser may attempt to display the PDF file inline, which could cause issues if the browser does not have a built-in PDF viewer or if the PDF file is not displayed correctly. To solve this issue, you can force the browser to download the PDF file instead of displaying it inline by setting the 'Content-Disposition' header to 'attachment'. 

// Set the 'F' parameter to 'I' to send the PDF file to the browser for display
$pdf->Output('example.pdf', 'I');

// Force the browser to download the PDF file instead of displaying it inline
header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename="example.pdf"');
readfile('example.pdf');

Keywords

TCPDF Output function F parameter I parameter PDF files

Related Questions