Sets the base URI for all XSLT transformations, the base URI is used with Xpath instructions to resolve document() and other commands which access external resources. It is also used to resolve URIs for the <xsl:include> and <xsl:import> elements.
The XSLT processor link identifier, created with xslt_create().
The base URI to be used.
As of PHP 4.3.0, the default base URI is the directory of the executing script.
In effect, it is the directory name value of the |