title: Find characters in string in TWIG
body: <p>I have this hidden field :</p>
  
  <pre><code>&lt;input type="hidden" id="PartNum" name="pn" value="{{ price.getPartNumber }}"&gt;
  </code></pre>
  
  <p>And this <code>input text</code></p>
  
  <pre><code>&lt;input type="hidden" id="ltid" name="lt" value="{{ price.getLt }}"&gt;
  </code></pre>
  
  <p>I want do a test on the value of the <code>PartNumber</code> <code>value="{{ price.getPartNumber }}"</code></p>
  
  <p>If it contains this String <code>35-l0l-1003</code> I should change the value of the <code>value="{{ price.getLt }}"</code> to <code>30</code></p>
  
  <p>I should use <code>strpbrk</code> to search a string for any of a set of characters.
  I'm beginner in <code>Twig</code> and I don't know how can I add it.
  Please can you help me.
  Thank you.</p>