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<?php $arr = [ 0 => 'DR-876-000-3.jpg', 1 => 'DRhgh000-2.jpg', 2 => 'DR-876-000-1.jpg', 3 => 'DR-876-000.png', 4 => 'DR-876-000.jpg', 5 => 'DR-876-000-4.jpg', ]; usort ( $arr , function ($a, $b) { return strnatcmp(pathinfo($a, PATHINFO_FILENAME), pathinfo($b, PATHINFO_FILENAME)); }); var_dump($arr);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(6) { [0]=> string(14) "DR-876-000.png" [1]=> string(14) "DR-876-000.jpg" [2]=> string(16) "DR-876-000-1.jpg" [3]=> string(16) "DR-876-000-3.jpg" [4]=> string(16) "DR-876-000-4.jpg" [5]=> string(14) "DRhgh000-2.jpg" }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
array(6) { [0]=> string(14) "DR-876-000.jpg" [1]=> string(14) "DR-876-000.png" [2]=> string(16) "DR-876-000-1.jpg" [3]=> string(16) "DR-876-000-3.jpg" [4]=> string(16) "DR-876-000-4.jpg" [5]=> string(14) "DRhgh000-2.jpg" }

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