Question

I can’t for the life of me figure out why this function is causing multiple entries into my database table…

When I run the function I end up with two records stacked on top of each one second apart

screen cap http://img132.imageshack.us/img132/5053/screenshot20100517at259.png

here is the function:

function generate_signup_token(){
    $connection = new DB_Connect(); // <--- my database connection class
    $ip = mysql_real_escape_string($_SERVER['REMOTE_ADDR']); 
    $sign_up_token = uniqid(mt_rand(), true);
    $_SESSION['signup_token'] = $sign_up_token;
    $sign_up_token = mysql_real_escape_string($sign_up_token);
    $query = "INSERT INTO `token_manager` (`ip_address`, `signup_token`) VALUES ('$ip', '$sign_up_token')";
    mysql_query($query);
}

generate_signup_token();

Answer 1

The biggest piece of evidence that this function is being called more than once is the different signup tokens that are being generated.

Also, there is a one second difference between inserts which may be indicative of multiple page requests. If there is consistently such a time disparity, I’d investigate the access log. If there’s only one page request, then the function must be called more than once somehow.