Get language

<?php
function printFormat($var){
  echo str_replace(array("  ","\n"), array(" &nbsp;","<br>"), print_r($var,true))."<br>";
}
function language_by_q($simpleLang = true){
  $primary = array();
  $accept = explode(",",$_SERVER["HTTP_ACCEPT_LANGUAGE"]);
  for($i = 0; $i < count($accept); $i++){
    $lang = explode(";", $accept[$i]);
    $q = 1;
    if(isset($lang[1])){
      $pos = strpos($lang[1], "=");
      if($pos !== false)
        $q = floatval(substr($lang[1], $pos + 1));
    }
    if($simpleLang){
      $pos = strpos($lang[0], "-");
      if($pos !== false)
        $lang[0] = substr($lang[0], 0, $pos);
    }
    if(in_array($q, $primary))
      $q -= 0.001;
    if(isset($primary[$lang[0]]))
      continue;
    $primary[$lang[0]] = $q;
  }
  arsort($primary,SORT_NUMERIC);
  return $primary;
}

echo "Jazyky od prohlížeče: <br>";
printFormat($_SERVER["HTTP_ACCEPT_LANGUAGE"]);
/* Příklad:  cs,en-GB;q=0.8,en;q=0.6  */

echo "<br>Vybrán jen hlavní jazyk<br>";
printFormat(language_by_q());
/* Příklad:  Array
(
   [cs] => 1
   [en] => 0.8
)  */

echo "<br>Vybrány lokalizace jazyků<br>";
printFormat(language_by_q(false));
/* Příklad: Array
(
   [cs] => 1
   [en-GB] => 0.8
   [en] => 0.6
) */
?>