PHP array vs [ ] in method and variable declaration

Question

I have a question about PHP syntax.

When defining functions and variables, which convention should I use?

I know they do the same thing in practice but I wou

Answer 1

from PHP docs:

As of PHP 5.4 you can also use the short array syntax, which replaces array() with [].

 "bar",
    "bar" => "foo",
);

// as of PHP 5.4
$array = [
    "foo" => "bar",
    "bar" => "foo",
];
?>

if you'd try using '[]' notation in earlier version than 5.4, it will fail, and PHP will throw a syntax error

for backward-compatibility you should use array() syntax.