PDF Download Issue with POST Method - Downloads PHP Code Instead of PDF

[YtimoDeng]

Hello,

I am experiencing an issue with the TCPDF library when using the POST method to generate a PDF for inline viewing. While the inline viewing works correctly, clicking the download button results in an attempt to download PHP code, which subsequently fails.

Environment:

PHP Version: 7.4.30
TCPDF Library Version: 6.3.2

Expected Behavior:

The PDF should download correctly.

Actual Behavior:

In Chromium-based browsers, an attempt is made to download PHP code instead of the PDF, resulting in a failure. However, the download works correctly in Firefox.

Additional Information:

• The issue does not occur in my test environment, where the PHP version is 7.4.13, and the TCPDF library version is also 6.3.2.
• The test environment allows downloading the PDF normally in all browsers.

Any guidance or suggestions on how to resolve this issue would be greatly appreciated.

Thank you for your help!