Why doesn't it return the value of the associative array?

Question

PHP

php code ===========
$e1 = array(
"t1" => 112,
"t2" => 113);
$e2 = array(
"s1" => 227,
"s2" => 228);
$e = array(
"one" => $e1,
"two" => $e2);
echo ""
===================
* Outputs:
--e1
---t1: 112
---t2: 113
--e2
---s1: 227
- --s2: 228
Next, I'd like to output one array.
===========code php (adding)
$arrMy = $e["one"];
echo ""
===================
The console displays:
<
< illegal string offset 'one' in C:\test\test.php on line 17 >

Answer 1

The same code worked perfectly...
If this is just an abstract example, perhaps in real code you have a redefinition of this array, for example $e is used as an iterator in a loop.
foreach ($arrMy as $e => $item) {}

Answer 2

Didn't understand your code. Everything works:

$e1 = array(
  "t1" => 112,
  "t2" => 113);
$e2 = array(
  "s1" => 227,
  "s2" => 228);
$e = array(
  "one" => $e1,
  "two" => $e2);

$arrMy = $e["one"];

print_r($arrMy);

Result:

Array
(
    [t1] => 112
    [t2] => 113
)

Answer 3

unexpected token

clearly speaks of a typo. Apparently the bracket is superfluous or missing. Put an editor with syntax highlighting, it will stupidly emphasize where the error is.