phpan/phpstan clean up runs, minor update to DB\IO

DB\IO dbReturn method has a third parameter to set read only assoc and
not number data from the query

Install basic composer for trying out psalm

setting phpan/phpstan for basic static checking and do basic clean up on
all of the files

www/admin/other_test.php

@@ -21,3 +21,14 @@ class FooBar
 		echo "B: $wrong<br>";
 	}
 }
+
+$foo = $bar ?? 'EMPTY';
+echo "BAR: ".$foo."<br>";
+// define('DS', DIRECTORY_SEPARATOR);
+$ds = defined('DS') ? DS : DIRECTORY_SEPARATOR;
+$du = DS ?? DIRECTORY_SEPARATOR;
+echo "DS is: ".$ds."<br>";
+
+echo "SERVER HOST: ".$_SERVER['HTTP_HOST']."<br>";
+
+// __END__