How to detect user language in PHP, php detects user_PHP tutorial

How PHP detects user language, php detects user

The example in this article describes the method of PHP detecting user language. Share it with everyone for your reference. The details are as follows:

function getPreferredLanguage() {
 $langs = array();
 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
  // break up string into pieces (languages and q factors)
  preg_match_all('/([a-z]{1,8}(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*(1|0\.[0-9]+))?/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'], $lang_parse);
  if (count($lang_parse[1])) {
   // create a list like "en" => 0.8
   $langs = array_combine($lang_parse[1], $lang_parse[4]);
   // set default to 1 for any without q factor
   foreach ($langs as $lang => $val) {
    if ($val === '') $langs[$lang] = 1;
   }
   // sort list based on value 
   arsort($langs, SORT_NUMERIC);
  }
 }
 //extract most important (first)
 foreach ($langs as $lang => $val) { break; }
 //if complex language simplify it
 if (stristr($lang,"-")) {$tmp = explode("-",$lang); $lang = $tmp[0]; }
 return $lang;
}

I hope this article will be helpful to everyone’s PHP programming design.

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