The extension is working with TYPO11 and PHP 7.4. With PHP 8 it is also working but there are some deprecation warnings like "Deprecated: Optional parameter $isunicode declared before required parameter $currentfont is implicitly treated as a required parameter ...".

Method \Extcode\TCPDF\Service\TsTCPDF::getStandaloneView, line 234, iterates over the configured templateRootPaths settings. Because the paths are sorted descending by key, a configured override comes first, the default last, resetting the template path of the override. In effect, the templates are evaluated the other way around, than extbase/fluid do by default.

The method should use an array_reverse call on the templateRootPaths setting or break out of the loop on the first found template.

I love your extentions cart, cart_paypal and i would like to extend these with your cart_pdf extention (tcpdf included) but i get this problem:

FE Error:
TCPDF ERROR: Unable to create output file: /tmp/tempfile.pdf

Relativ directory here seems to be ok, but Systemlog shows this:

SystemLog of Typo3:
Core: Error handler (FE): PHP Warning: fopen**(file:///tmp/tempfile.pdf)**: failed to open stream:

Operation not permitted in /var/www/virtual/mydomain.de/htdocs/typo3conf/ext/tcpdf/Resources/Private/Library/tcpdf/include/tcpdf_static.php line 1854

Core: Error handler (FE): PHP Warning: fopen**(file:///tmp/tempfile.pdf)**: failed to open stream:

Operation not permitted in /var/www/virtual/mydomain.de/htdocs/typo3conf/ext/tcpdf/Resources/Private/Library/tcpdf/include/tcpdf_static.php line 1854

Typo3 v. 8.7.8
PHP v. 7.1.5
MySQL v. 5.5.57
Multidomainsetup

Update - my workaround:

FILE: \cart_pdf\Classes\Service\PdfService.php
DEL LINE 291: $pdfFilename = '/tmp/tempfile.pdf';
ADD LINE 291: $pdfFilename = 'myfileadminname/tmp/tempfile.pdf';

FILE: tcpdf/Resources/Private/Library/tcpdf/include/tcpdf_static.php
DISABLE LINE 1849 to 1853:
public static function fopenLocal($filename, $mode) {
/**if (strpos($filename, '://') === false) {
$filename = 'file://'.$filename;
} elseif (stream_is_local($filename) !== true) {
return false;
}*/
return fopen($filename, $mode);

Method \Extcode\TCPDF\Service\TsTCPDF::renderStandaloneView evaluates file paths into an absolute path, which is then used as the files URL. Method \TCPDF::openHTMLTagHandler checks if a file path starts with the document root and prepends it if not. When having a different web document root than TYPO3 document root, like when using helhum/secure-web, the document root gets prepended to the already absolute path.

The method should check if a file exists, thus check if the path needs to be fixed before trying to actually fix it.