Disabling the libxml entity loader will globally break file loading

Created by: samsonradu

Disabling the entity loader in the Introspector will globally break the load() function:

libxml_disable_entity_loader(true);      
...
$xsl = new \DOMDocument();
$xsl->load(__DIR__ . '/transform.xsl');

The above will throw an error:

failed to load external entity "/path/to/transform.xsl"

Perhaps it would be good to reset the entity loader to its initial value after loading the XML string.