Multi dimentional array to single dimentional with preserved structur…

…e and vice versa

src/stdlib/src/Helper/ArrayHelper.php

@@ -1392,4 +1392,88 @@ public static function shuffle($array, $seed = null)
 
         return $array;
     }
+
+    /**
+     * Shorten an multidimensional array into a single dimensional array concatenating all keys with separator.
+     * 
+     * [
+     *      'country' => [
+     *          0 => [
+     *              'name' => 'Bangladesh',
+     *              'capital' => 'Dhaka'
+     *          ]
+     *      ]
+     * ]
+     * 
+     * to [
+     *  'country.0.name' => 'Bangladesh',
+     *  'country.0.capital' => 'Dhaka'
+     * ]
+     * 
+     * @param array $input
+     * @param string $separator
+     * @param string|int $path
+     * 
+     * @return array
+     */
+    public static function short(array $input, string $separator = '.', $path = null): array
+    {
+        $data = [];
+
+        if ($path !== null) {
+            $path .= $separator;
+        }
+
+        foreach ($input as $key => &$value) {
+            if ((array) $value !== $value) {
+                $data[$path.$key] = $value;
+            } else {
+                $data = array_merge($data, static::short($value, $separator, $path.$key));
+            }
+        }
+
+        return $data;
+    }
+
+    /**
+     * Unshorten a single dimensional array into multidimensional array.
+     * 
+     * [
+     *  'country.0.name' => 'Bangladesh',
+     *  'country.0.capital' => 'Dhaka'
+     * ]
+     * 
+     * to [
+     *      'country' => [
+     *          0 => [
+     *              'name' => 'Bangladesh',
+     *              'capital' => 'Dhaka'
+     *          ]
+     *      ]
+     * ]
+     * 
+     * @param array $input
+     * @param string $separator
+     * 
+     * @return array
+     */
+    public static function unshort(array $input, string $separator = '.'): array
+    {
+        $result = [];
+
+        foreach ($input as $key => $value) {
+            if (strpos($key, $separator) !== false) {
+                $str = explode($separator, $key, 2);
+                $result[$str[0]][$str[1]] = $value;
+
+                if (strpos($str[1], $separator)) {
+                    $result[$str[0]] = static::unshort($result[$str[0]], $separator);
+                }
+            } else {
+                $result[$key] = is_array($value) ? static::unshort($value, $separator) : $value;
+            }
+        }
+
+        return $result;
+    }
 }