Question

Is there a way we can toggle to find out numbers that are not included inside the associative array set?

so if the data is

[options] => Array
                (
                    [1] => locality
                    [2] => postcode
                    [3] => dwelling_type
                    [4] => typical_value
                    [5] => dsr
                    [6] => dsr_summary
                    [13] => yield
                    [15] => search_dsr
                    [16] => sr
                    [17] => month
                    [18] => year
                )

How do I get an output of 7,8,9,10,11,12,14 programmically if the total count was 18?

SOLVED:

Actually my final answer is

$existingKeys = array_keys($options['User']['options']);
$Keys = range(0,18);
$missingKeys = array_diff($Keys,$existingKeys);

Answer 1

$existingKeys = array_keys($myArray['options']);
$minMaxrange = range(min($existingKeys),max($existingKeys));
$missingKeys = array_diff($minMaxrange,$existingKeys);