?xml version=" 1.0"? !DOCTYPE foo [!ENTITY testEnt "test entity "] foo element attrib="value" / testEnt; ?php print "This is some more PHP code being executed .";? / foo
?xml version=" 1.0 "? !DOCTYPE foo [!ENTITY testEnt "test entity"? foo element attrib="value"? testEnt; ?php print "This is some more PHP code being executed .";? / foo