title: Remove unwanted characters in a string
body: <p>I would like to ask how to remove a special character from a string(extracted from a scrapped page).</p>
  
  <pre><code>Â 4:30am
  </code></pre>
  
  <p>I just want to get the time so ive tried so filter it using this:</p>
  
  <pre><code>$str = 'Â 4:30am';
  $new_string = preg_replace("[^A-Za-z0-9]", "", $str); 
  echo '&lt;pre&gt;'.$new_string.'&lt;/pre&gt;';
  </code></pre>
  
  <p>But it doesn't change :|
  Is there any solution/approach?</p>