Undefined array key 26085 in tcpdf.php line 22263

[liayn]

version 6.6.1

affected line: if ((!$intag) AND (!$skip) AND TCPDF_FONT_DATA::$uni_type[$char] == 'L') {

[williamdes]

Can you provide some code on how you trigger this? Or the full stack trace?

[liayn]

I'm sorry, no. We just found it in the logs. I can try to reproduce, but I suspect a case, where a really large dataset is used to create PDF. But the fix is trivial: if ((!$intag) AND (!$skip) AND (TCPDF_FONT_DATA::$uni_type[$char] ?? '') == 'L') {

[williamdes]

Okay

Yeah and using isset because ?? is php 7+ only haha

[liayn]

I'm totally fine with a tcpdf v7 that is php8.1+ only. php v7 is dead already... so that's it

[williamdes]

Yeah but welcome to the long long term support We support php 5.3 up to 8.2 here

[liayn]

I know long term... no worries. But for the sake of dev piece and invention stagnation avoidance we usually split into to versions for legacy and current stuff. In TCPDF case this would be 8.x and anything below. (This issue only happens on 8.x anyway)

[williamdes]

Thanks for reporting this issue, we will try to reproduce it because tests are important and fix it

[annuh]

We are facing the same issue, for example when adding this text to a PDF 斯 لارس:

Warning: Undefined array key 25289

#0 /var/task/vendor/tecnickcom/tcpdf/tcpdf.php(4113): TCPDF_FONTS::utf8Bidi(Array, '\\xE6\\x8B\\x89\\xE7\\x88\\xBE\\xE6...', false, true, Array)",
#1 /var/task/vendor/tecnickcom/tcpdf/tcpdf.php(18523): TCPDF->GetStringWidth('\\xE6\\x8B\\x89\\xE7\\x88\\xBE\\xE6...')",
#2 /var/task/vendor/tecnickcom/tcpdf/tcpdf.php(5934): TCPDF->writeHTML('    <p style=\"f...', true, false, true, true, '')",
#3 /var/task/vendor/tecnickcom/tcpdf/tcpdf.php(17261): TCPDF->MultiCell(64.249217935349, 0, '    <p style=\"f...', 1, '', false, 0, 0, 0.0, true, 0, true, true, 0, 'T', false)",

It seems some Unicode characters are missing from this list https://github.com/tcpdf-clone/tcpdf/blob/master/include/tcpdf_font_data.php#L10617.

We are using v6.6.5.