title: How to make strpos case insensitive
body: <p>How can I change the strpos to make it non case sensitive. The reason is if the <code>product-&gt;name</code> is <em>MadBike</em> and the search term is <em>bike</em> it will not echo me the link.
  My main concern is the speed of the code.</p>
  
  <pre><code>&lt;?php
  $xml  = simplexml_load_file('test.xml');
  $searchterm = "bike";
  foreach ($xml-&gt;product as $product) {
  if (strpos($product-&gt;name, $searchterm) !== false ) {
  echo $product-&gt;link;
  } }
  ?&gt;
  </code></pre>