如果json具有特殊字符，则json_decode返回null，例如＆

For API - JSON decode returns null, if the data has special character like &,#.

$custom_name = json_decode($request->custom_name);

// custom_name=[{"id":"1","name":"ff#&test"},{"id":"12","name":"test1"}]
print_r($custom_name); // returns null

I displayed json_last_error() - it display as error code 3

How to handle this data.