XSLT (PHP4)
PHP Manual

Constantes pré-definidas

As contantes abaixo são definidas por esta extensão e somente estarão disponíveis quando a extensão foi compilada com o PHP ou carregada dinamicamente durante a execução.

XSLT_OPT_SILENT ( integer )
Drop all logging and error reporting. This is a generic option for all backends that may be added in the future.
XSLT_SABOPT_PARSE_PUBLIC_ENTITIES ( integer )

Tell Sablotron to parse public entities. By default this has been turned off.

XSLT_SABOPT_DISABLE_ADDING_META ( integer )

Do not add the meta tag "Content-Type" for HTML output. The default is set during compilation of Sablotron.

XSLT_SABOPT_DISABLE_STRIPPING ( integer )
Suppress the whitespace stripping (on data files only).
XSLT_SABOPT_IGNORE_DOC_NOT_FOUND ( integer )
Consider unresolved documents (the document() function) non-lethal.
XSLT_SABOPT_FILES_TO_HANDLER ( integer )
XSLT_ERR_UNSUPPORTED_SCHEME ( integer )
Error return code, for scheme handlers.

XSLT (PHP4)
PHP Manual