PHP can detect code snippets in the language used by the user's browser

Use the following PHP code snippet to detect the language used by the user's browser

function get_client_language($availableLanguages, $default='en'){
 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
 foreach ($langs as $value){
 $choice=substr($value,0,2);
 if(in_array($choice , $availableLanguages)){
 return $choice;
 }
 }
 }
 return $default;
}

PHP