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<?php function array_rand_cryptographically_secure(array $array): int|string { $max = count($array) - 1; if ($max < 0) { throw new ValueError ('Argument #1 ($array) cannot be empty'); } return key(array_slice($array, random_int(0, $max), 1, true)); } $tests = [ [5, 6, 7], ['a' => 1, 'b' => 2, 'c' => 3], ['zero', 4 => 'four', 9 => 'nine'] ]; foreach ($tests as $test) { echo array_rand_cryptographically_secure($test) . "\n"; }

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