Why Is My PDF Download Not Working?

Troubleshooting PHP Headers for PDF File Downloads

Problem:
Despite implementing header configurations, the application fails to open a PDF upon user click. The headers currently in use are:

<code class="php">$filename = './pdf/jobs/pdffile.pdf';
$url_download = BASE_URL . RELATIVE_PATH . $filename;

header("Content-type:application/pdf");
header("Content-Disposition:inline;filename='$filename'");
readfile("downloaded.pdf");</code>

Solution:

To resolve this issue, it is necessary to adjust the header configurations to the following:

<code class="php">header("Content-type:application/pdf");

// Set the file disposition to attachment for download
header("Content-Disposition:attachment;filename=\"downloaded.pdf\"");

// Read the actual PDF file from its source
readfile("original.pdf");</code>

Additional Notes:

• It is crucial to call the header() function before sending any output.
• Output buffering can be employed to correct this problem in PHP 4 and later versions.

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