在数组中查找不在另一个中的值？

This is not working as I would expect it to be. I need to find the values in $foundfiles which are NOT present in $results. The keys will never match... I am only interested in comparing the capture#.jpg.

$foundfiles example :

Array
(
    [0] => capture1000.jpg
    [1] => capture10045.jpg
    [2] => capture10050.jpg
    ... and so on

$results example :

Array
(
    [0] => capture27254.jpg
    [1] => capture27352.jpg
    [2] => capture27450.jpg
    ... and so on

$image_set = array_diff($foundfiles, $results);

In this example $image_set should contain all values in $foundfiles because none of them are present in $results.