Function for flatten an array

array_flatten.php

/**
 * Flatten an array
 * Example array [1, [2, 3, 4], [5, 6], [7, [8, 9]], 10] becomes
 * [1, 2, 3, 4, 5, 6, 7, [8, 9], 10]
 * Work only for one level
 * 
 * @param array $array Array to flatten
 * @return array
 */
function array_flatten(array $array): array
{
    $temp = [];

    foreach ($array as $value) {

        if (is_array($value)) {
            $temp = array_merge($temp, $value);
            continue;
        }

        $temp[] = $value;
    }

    return $temp;
}

/**
 * Flatten an array recursively
 * Example array [1, [2, 3, 4], [5, 6], [7, [8, 9]], 10]  becomes
 * [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 * 
 * @param array $array Array to flatten
 * @return array
 */
function array_flatten_recursive(array $array): array
{
    $temp = [];

    foreach ($array as $value) {

        if (is_array($value)) {
            $temp = array_merge($temp, array_flatten($value));
            continue;
        }

        $temp[] = $value;
    }

    return $temp;
}