php call array from string

Question

I have a string that contains elements from array.

$str = \'[some][string]\';
$array = array();

How can I get the value of $array[\'some\

Answer 1

// trim the start and end brackets    
$str = trim($str, '[]');
// explode the keys into an array
$keys = explode('][', $str);
// reference the array using the stored keys
$value = $array[$keys[0][$keys[1]];