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<?php $array = [ 'd' => [ 'f', 'e', ], 'a' => [ 'c', 'j', ], ]; ksort($array); foreach ($array as $key => &$values) { sort($values, SORT_NATURAL); } print_r($array);
Output for 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [a] => Array ( [0] => c [1] => j ) [d] => Array ( [0] => e [1] => f ) )

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