title: preg_match white space
body: <p>I would like to ask you about regular expressions preg_match have outlined below. I wish to express their approval to add white space. For one and the other expression. I know that white space is represented by a /s But I can not deal with it. please help</p>
  
  <pre><code>    'string' =&gt; array(
          'pattern' =&gt; '^([a-zA-Z ]+)$',
      ),
  
      'numericString' =&gt; array(
          'pattern' =&gt; '^[a-zA-Z0-9]+$',
      )
  
      'numeric' =&gt; array(
          'pattern' =&gt; '^[0-9]+$',
      ),
  </code></pre>
  
  <p>Please help i need add white space to any.</p>