title: Php str_replace not working with special chars
body: <p>why isn't this working as expected:</p>
  
  <pre><code> echo str_replace("Ã©","é","FÃ©dÃ©ration Camerounaise de Football");
  </code></pre>
  
  <p>result:</p>
  
  <pre><code>"FÃ©dÃ©ration Camerounaise de Football"
  </code></pre>
  
  <p>i'm expecting to have:</p>
  
  <pre><code>"Fédération Camerounaise de Football"
  </code></pre>