title: Php - regular expression to check if the string has chinese chars
body: <p>I have the string <code>$str</code> and I want to check if it`s content has Chinese chars or not (true/false)</p>
  
  <pre><code>$str = "赕就可消垻,只有当所有方块都被消垻时才可以过关";
  </code></pre>
  
  <p>can you please help me?</p>
  
  <p>Thanks!
  Adrian</p>