array_values

        $array = [
            '0'     =>      [
                'name'      =>      '111',
                'age'       =>      '2',
                ],
            '1'     =>      [
                'name'      =>      '111',
                'age'       =>      '2',
            ],
            '2'     =>      [
                'name'      =>      '111',
                'age'       =>      '2',
            ],
//            '4'     =>      [
//                'name'      =>      '111',
//                'age'       =>      '2',
//            ],
            '5'     =>      [
                'name'      =>      '111',
                'age'       =>      '2',
            ],
            '6'     =>      [
                'name'      =>      '111',
                'age'       =>      '2',
            ],
        ];

        dump(array_values($array));
        exit;

<pre>array(5) {
  [0] => array(2) {
    ["name"] => string(3) "111"
    ["age"] => string(1) "2"
  }
  [1] => array(2) {
    ["name"] => string(3) "111"
    ["age"] => string(1) "2"
  }
  [2] => array(2) {
    ["name"] => string(3) "111"
    ["age"] => string(1) "2"
  }
  [3] => array(2) {
    ["name"] => string(3) "111"
    ["age"] => string(1) "2"
  }
  [4] => array(2) {
    ["name"] => string(3) "111"
    ["age"] => string(1) "2"
  }
}
</pre>