title: explode() on Japanese string
body: <p>I have to use the explode() function on Japanese text but it doesn't work.</p>
  
  <p>Here is an example of what I have</p>
  
  <pre><code>$string = '私　は　イタリア　人　です';
  $string = explode(" ", $string);
  print_r($string);
  </code></pre>
  
  <p>That prints</p>
  
  <pre><code>Array ( [0] =&gt; 私　は　イタリア　人　です )
  </code></pre>
  
  <p>in place of</p>
  
  <pre><code>Array ( [0] =&gt; 私　[1] =&gt; は　[2] =&gt; イタリア　[3] =&gt; 人　[4] =&gt; です )
  </code></pre>
  
  <p>It seems that <code>explode()</code> can't recognize the spaces inside that text.</p>
  
  <p>What's the reason? How could I make it work?</p>