I use the section, but this error occurs, in fact, it enters the site and everything is done correctly, but this error occurs behind the scenes. What is the solution? PHP Notice: Undefined index: walletaddrass in /home/decent/public_html/user/presale.php on line 5
$id_wallet = $_SESSION["walletaddrass"]; The quantification is done as follows: $_SESSION["walletaddrass"] = $id_wallet; setcookie('logged-in','true', time() + 286400 , '/');