windows "Sablotron error on line 1: XML parser error 4: not well-formed (invalid token)"

The documentation on xslt_set_base () states that you must provide an
file:// prefix with setting the base. It seems that you should provide
the same prefix when passing files to xslt_process ().

The following works fine with me, using the "Very important" example
from above with local xml and xslt files, named 'sample.xml' and
'sample.xsl' respectively:

<?php

$xsltProcessor = xslt_create ();


$fileBase      = 'file://' . getcwd () . '/';


$result        = xslt_process (
   $xsltProcessor,
   $fileBase . 'sample.xml',
   $fileBase . 'sample.xsl'
);


if ( $result ) {
   echo 'Success ...';
   echo '<pre>', "\n";
   echo htmlentities ( $result );
   echo '</pre>';
} else {
   echo 'Fail due to error: ' . xslt_error($xh);
}


xslt_free ( $xsltProcessor );
?>

Alternatively, you can use the xslt_set_base function to provide the
processor with an explicit working directory:
<?php

$xsltProcessor = xslt_create ();


$fileBase      = 'file://' . getcwd () . '/';


xslt_set_base ( $xsltProcessor, $fileBase );


$result        = xslt_process (
   $xsltProcessor,
   'sample.xml',
   'sample.xsl'
);


if ( $result ) {
   echo 'Success ...';
   echo '<pre>', "\n";
   echo htmlentities ( $result );
   echo '</pre>';
} else {
   echo 'Fail due to error: ' . xslt_error($xh);
}


xslt_free ( $xsltProcessor );
?>