/*
* 返回多维数组里的一维数组元素
* @author MAGENJIE(magenjie@variflight.com)
* @datetime 2019-04-18T14:38:31+0800
* $a = [ 'a' => ['b' => ['c','e','f']], 'd' => ['11','22','33'], 'g' => 'xxx'];
* $b = array_element_recursive($a);
* var_dump($b);
* array(3) {
  [0]=>
  array(3) {
    [0]=>
    string(1) "c"
    [1]=>
    string(1) "e"
    [2]=>
    string(1) "f"
  }
  [1]=>
  array(3) {
    [0]=>
    string(2) "11"
    [1]=>
    string(2) "22"
    [2]=>
    string(2) "33"
  }
  [2]=>
  string(3) "xxx"
* }*/
if (!function_exists('array_element_recursive')) {
    function array_element_recursive($array, &$return = []){
        foreach ($array as $key => $value) {
            if (is_array($value)) {
                if (count($value) === count($value, 1)) {
                    $return[] = $value;
                }else{
                    array_element_recursive($value, $return);
                }
            }else{
                $return[] = $value;
            }
        }
        return $return;
    }
}