fix preg_splite not in unicode mode may cause some chinese character error

if reg_splite not in unicode mode may cause some chinese character split error

example: 
```php
/**
 * 套装
 * 
 * @param string $name bundleName
 *
 * @return void
 */
```

when reg_splite not in unicode, result is , that not be right:
```
array(3) {
  [0] =>
  string(1) " "
  [1] =>
  string(5) "套�"
  [2] =>
  string(2) "�
"
}
```
but use unicode, result is:
```
array(3) {
  [0] =>
  string(1) " "
  [1] =>
  string(6) "套装"
  [2] =>
  string(1) "
"
}
```