为什么$$ var ['named Index'] ='test'不起作用？

Question

In PHP you can you

$var = 'title';
$$var = 'my new title'; 

and it works fine. But when you try to use it with array, it doesnt work and no errors are reported.

$var = 'title';
$$var['en'] = 'my english title';

$var = 'description';
$$var['en'] = 'my english description';

Thanks for the help

[EDIT] If I do

$$var = array();
array_push($$var,'test');

it works and it outputs

title[0] = 'test';

But I really need named index : /

Answer 1

write it like this:

${$var}['en']

from the docs:

In order to use variable variables with arrays, you have to resolve an ambiguity problem. That is, if you write $$a1 then the parser needs to know if you meant to use $a1 as a variable, or if you wanted $$a as the variable and then the 1 index from that variable. The syntax for resolving this ambiguity is: ${$a1} for the first case and ${$a}1 for the second.

Link For Reference