Fix: prevent null being passed to htmlspecialchars() in AbstractPart.php #2828
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Description
This PR fixes deprecation warnings in PHP 8.1+ caused by
htmlspecialchars()receivingnull.The affected code paths occur when XML nodes or text content may be missing.
Fix applied by using the null coalescing operator (
?? '') to ensure a string is always passed."DEPRECATE: vendor/phpoffice/phpword/src/PhpWord/Reader/Word2007/AbstractPart.php line 300 user unknown -- htmlspecialchars(): Passing null to parameter 0000001 ($string) of type string is deprecated"
Checklist: