[php] fix field acces on TNew inside of a TCast (fixes #6294)

src/generators/genphp.ml

@@ -833,7 +833,7 @@ and gen_member_access ctx isvar e s =
 	| _ -> print ctx "->%s" (if isvar then s_ident_field s else s_ident s)
 
 and gen_field_access ctx isvar e s =
-	match e.eexpr with
+	match (reveal_expr e).eexpr with
 	| TTypeExpr t ->
 		let isglobal = match t with
 		| TClassDecl(c) -> Meta.has Meta.PhpGlobal c.cl_meta && c.cl_extern

tests/unit/src/unit/issues/Issue6294.hx

@@ -0,0 +1,14 @@
+package unit.issues;
+
+class Issue6294 extends unit.Test {
+    public function test() {
+        (cast (new Foo():{})).handle();
+        t(true);
+    }
+}
+
+@:keep
+private class Foo {
+    public function new() {}
+    public function handle() {}
+}