如何用变量填充多维关联数组项？

Question

I'm trying to populate a multi-dimensional associative array item in PHP with the following variables:

$number = 1;
$status = 'active';

My array item is currently 'hard-coded' like this:

$settings['1']['active'];

How can I replace the '1' and 'active' with $number and $status ?

I've tried the following but am not sure if it is the right way to do it:

$settings['$number']['$status'];

Answer 1

You can't interpolate values in strings defined with single quotes, you should use double " :

$settings["$number"]["$status"];

or

$settings["{$number}"]["{$status}"];

In your case they are not necessary at all :

 $settings[$number][$status];

Answer 2

Close! Try:

$settings[$number][$status];

( Note: When you start indexing arrays with variables, it would be good to first check that the element exists in the array with array_key_exists() http://us3.php.net//manual/en/function.array-key-exists.php )

Answer 3

PHP doesn't actually have indexes for arrays, so $settings[1] and $settings['1'] will function the same way. If you'd like to read more about it, check out this PHP.net page on arrays .