title: PHP str_replace doesnt replace character "°"
body: <p><strong>Hello !</strong></p>
  
  <p>I am getting a String from a .xlsx file -><code>"N°X"</code></p>
  
  <p>I would like to replace <code>"N°"</code> by <code>Num_X</code></p>
  
  <p>I am trying to do this with</p>
  
  <pre><code>$var = str_replace("N°","Num_",$var);
  </code></pre>
  
  <p>But nothing is replaced (according to <code>echo $var</code>)
    problem come from <code>°</code> because when i try to replace some String by other 
    (without <code>°</code>) str_replace works </p>
  
  <p>Any suggestions ?</p>