Formula: Getting and setting array and object item values by key with [] syntax #3324
Description
Applicable only for variables.
Arrays:
$list = list();
$list[0] = '0';
$list[1] = '1';
$list[0 + 2] = '2';
$v = $list[2];
Objects:
$o = object\create();
$o['a'] = 'a';
$v = $o['a'];
Nested access:
$list = list(list());
$list[0][0] = 1;
Reading by a non-existent key results in an error.
Null-coalescing prevents the error:
$list = list();
$v = $list[0] ?? 0;