Example param array:

array("get_all", "mySchemeHandler")

Example scheme handler function:

function mySchemeHandler($processor, $scheme, $param) { // to remove the first slash added by Sablotron $param = substr($param, 1);

   if ($scheme == 'file_exists')
   {   // result is returned as valid xml string
   return '<?xml version="1.0" encoding="UTF-8"?><root>'.(file_exists($param) ? "true" : "false")."</root>";
}

}

To use the schema handler use: do something

To call the external function use the 'document()' XSLT-Function.

Schemename and parameter will be passed to the handler function as second and third parameter. The return value of the function must be valid XML to access it using XPath.

Parameters