https://www.php.net/manual/de/tidy.props.errorbuffer.php
PHP: tidy::$errorBuffer - Manual
Return warnings and errors which occurred parsing the specified document
phptidymanual
https://curl.se/mail/lib-2011-10/0078.html
Curl: [PATCH] typecheck: allow NULL to unset CURLOPT_ERRORBUFFER
curlpatchallownullunset
https://www.php.net/manual/uk/tidy.props.errorbuffer.php
PHP: tidy::$errorBuffer - Manual
Return warnings and errors which occurred parsing the specified document
phptidymanual