[php] don't expect iterator to have iterator field (fixes #69) (#71)

* [php] don't expect IntIterator to have a field which does not exist (fixes #69)

* cleanup

* fix Interp.makeIterator for Haxe 3.4

hscript/Interp.hx

@@ -597,7 +597,7 @@ class Interp {
 	}
 
 	function makeIterator( v : Dynamic ) : Iterator<Dynamic> {
-		#if ((flash && !flash9) || php)
+		#if ((flash && !flash9) || (php && !php7 && haxe_ver < '4.0.0'))
 		if ( v.iterator != null ) v = v.iterator();
 		#else
 		try v = v.iterator() catch( e : Dynamic ) {};