导入.t3d文件至TYPO3 12.4.6时遇htmlspecialchars类型错误求助

背景 #

• 根服务器崩溃后，从虚拟机恢复TYPO3 6.2.30文件备份，导出站点为.t3d文件
• 在配置接近新服务器的虚拟机上搭建TYPO3 12.4.6测试环境（v12界面简洁美观）
• 导入.t3d文件时后端报错：htmlspecialchars(): Argument #1 ($string) must be of type string, null given

相关日志 #

警告信息 #

Sun, 08 Oct 2023 18:27:27 +0000 [WARNING] request="418b1cee8d80d" component="TYPO3.CMS.Core.Error.ErrorHandler": Core: Error handler (BE): PHP Warning: Undefined array key "8e79286a8efa8a13de373312028aee83" in /srv/www/typo3_src-12.4.6/typo3/sysext/impexp/Classes/ImportExport.php line 721
Sun, 08 Oct 2023 18:27:27 +0000 [WARNING] request="418b1cee8d80d" component="TYPO3.CMS.Core.Error.ErrorHandler": Core: Error handler (BE): PHP Warning: Trying to access array offset on value of type null in /srv/www/typo3_src-12.4.6/typo3/sysext/impexp/Classes/ImportExport.php line 738

错误信息 #

Sun, 08 Oct 2023 18:27:27 +0000 [CRITICAL] request="418b1cee8d80d" component="TYPO3.CMS.Core.Error.ProductionExceptionHandler": Core: Exception handler (WEB: BE): TypeError, code #0, file /srv/www/typo3_src-12.4.6/typo3/sysext/impexp/Classes/ImportExport.php, line 738: htmlspecialchars(): Argument #1 ($string) must be of type string, null given - {"mode":"WEB","application_mode":"BE","exception_class":"TypeError","exception_code":0,"file":"/srv/www/typo3_src-12.4.6/typo3/sysext/impexp/Classes/ImportExport.php","line":738,"message":"htmlspecialchars(): Argument #1 ($string) must be of type string, null given","request_url":"http://[sitename.tld]/typo3/record/importexport/import?token=--AnonymizedToken--","exception":null}

问题排查 #

• 报错代码行（第738行）：$line['title'] = htmlspecialchars($fileInfo['filename']);
• 该问题与TYPO3 v11曾修复的Bug场景类似，推测是缺少?? ''的空值兜底处理
• 尝试手动添加空值处理后出现新错误，因自身PHP能力有限无法继续推进

求助疑问 #

TYPO3 v12标注为“新项目推荐”且稳定，是否应改用v11，半年后再升级？

内容的提问来源于stack exchange，提问作者Rossi