HTTP / 1.1 303重定向以避免刷新时重新提交

Question

Please i need your help. I'm scripting a comment functionality on my website, and i'm trying to reduce spamming to the barest minimum.. My issue/problem is that when users/bots(possibly) submit a comment, i have this code to do a HTTP/1.1 303 redirect to the same page so that when the user attempts to refresh the page the previous comment does not re-submit.

Will this be enough for spam reduction.

Thanks for your time, patience and answers. I most appreciate it.

          header("HTTP/1.1 303 See Other");
       header("Location: http://127.0.0.1/     main/forum/

Answer 1

I don't think would help you achive your goal which is reduce spamming you can do the following

A. Check if a page as been refresh then redirect and this has been discussed extensively here : see

PHP refresh

B. To prevent proper flooding to need to limit number of request for sec for each IP address See

Prevent PHP script from being flooded

Edit 1

Non OOP version as requested by you :

$memcache = memcache_connect ( 'localhost', 11211 );
$runtime = memcache_get ( $memcache, 'floodControl' );
if ((time () - $runtime) < 2) {
    die ( "Die! Die! Die!" );
} 
else {
    echo "Welcome";
    memcache_set ( $memcache, "floodControl", time () );
}