strpos - strripos does not seems to work for me -

i'm trying use strripos in fact try add parameter url fro translating website,

the fact not on url requested have parameter can not everytime &lang=en need ?lang=en

i've tried function using strripos that

/**  * fonction qui renvoit le bon caractère en tant que paramètre  * @param type $string  * @return string  */ function checkparam($string){     $lookfor = "?";     $position = strripos($string, $lookfor);     if($position === true){     return "&";     }else{     return "?";     } } 

i have example url : $url_courante = $_server['server_name'].$_server['request_uri'];

which give me that

www.mydomain.eu/index.php?p=nos-produits 

but not recognize ? in string, returns me false , can not set lang url.

anykind of appreciated.

strripos returns integer or false, not true. switch condition around , check false.

function checkparam($string){     $lookfor = "?";     $position = strripos($string, $lookfor);     if($position === false){         return "?";     }else{         return "&";     } } 

also, there no need strripos because checking see if string exists. not matter if find first or last. case not issue when searching question mark, either. use strpos instead.