Question

$i = 'i';
$arr = array('hi' => 'test');
echo "$arr[h$i]";exit();

What’s the right version to do it without {}?

Say,I know can do it with “{$arr[‘h’ . $i]}”

EDIT

1.inside “”
2.with operation like “.”,i.e,[‘h’ . $i]
3.without {}

Answer 1

If you don’t want {}, you’ll need to do it this silly way:

$idx = "h$i";
echo "$arr[$idx]";exit();

Of course, you could also just do

$i = 'i';
$arr = array('hi'=>'test');
echo $arr["h$i"]; exit();

But I think maybe you oversimplified things for the purposes of your question.