how to get intervals from a range

Question

With algorithm how can I remove intervals within a range in php:

Example 1:

range: [8-22]

input:

interval: [11,13] interval: [16,18]

output:

[8,10] , [14,15], [19,22]

Example 2:

range: [8-22]

input:

interval: [8,11] interval: [16,18]

output:

[12,15], [19,22]

thanks

Answer 1

I already found a solution

$array = range(8, 22);
$newarray = array_diff($array, range(11, 13))

thanks