Time Limit

[Drugs]

<?php

$name = $_POST['name'];
$message = $_POST['message'];
$IP = $_SERVER['REMOTE_ADDR'];

if(empty($name) OR empty($message))
{
echo "

<script language='javascript'>

alert('You forgot to fill in one or more form fields...');

</script>
";

}
else
{

$name = htmlspecialchars($name);
$message = htmlspecialchars($message);
$shout = ("<font size=\"1\" face=\"Verdana\">
<b>$name</b>; $message<br><br>");

$read = fopen("textfiles/messages.txt", "r");
$contents = fread($read, filesize('textfiles/messages.txt'));
fclose($read);

$write = fopen("textfiles/messages.txt", "w");
fwrite($write, "$shout $contents");
fclose($write);

}
print "<meta http-equiv=\"refresh\" content=\"0;shoutbox.php\">";

?>

How do i make it so each unique user can only post once every 15 seconds?

Correctable (Forum Moderator) - Thread moved to Coding. Please post in the correct section.

[Per]

Dude this is like your 40th thread on your shoutbox, dude just make ONE thread called Drug needs help with shoutbox ;D
Then update there.

[Drugs]

Nah, lmao.

[Per]

Lmao
But most of them are like Shoutbox or Help!11one
So yeah *bumpage*

[ClubTime]

Is that the admin addtag or the normal one?

[nets]

An easy option would be to set a cookie which expires 15 seconds after being set, and each time the script is ran check if the cookie is set (and if it is, exit the script.) However, if someone were to clear their cookies or not have cookies enabled the script wont work.

if(isset($_COOKIE[postTime])) {

  print "<script type='text/JavaScript'>\n";
  printf("      alert('You cannot post more than once in 15 seconds, please wait %s seconds before 

posting again.');\n",
        (15-(time()-$_COOKIE[postTime])));
  print "</script>";

  exit();

}

setcookie('postTime', time(), time()+15); 

*I haven't tested that script*

I could create a script which uses MySQL, where it stops an IP address accessing the post page more than once in 15 seconds (if you feel this isn't enough protection.)