stop forum flooding

ok i have been having problems with people flooding my forum... any suggestions how i could stop this?
(i have shortend down my reply script)
<table width="70%" class='maintables'>
<tr class='headline'><td>Reply</td></tr>
	<tr class='maintables'>
		<td align="center">
			if(isset($_POST['submit'])) {
				if(strlen($yourpost)<1) {
					print "You did not type in a post."; //no post entered
					$thedate=date("U"); //get unix timestamp
					$displaytime = time();
					//we now strip HTML injections
					//This is where the bbcode come in.
					$message = new BBCode;
					$message->selection = $yourpost;
					$message->parseCode(); // set to 1 if you want to disable bbcode
					$yourpost = $message->parsed;
					$insertpost="INSERT INTO `forumtutorial_posts` (`author`,`forum`,`title`,`post`,`showtime`,`realtime`,`lastposter`,`parentid`) values('$name','$forum','$subject','$yourpost','$thedate','$thedate','$name','$id')";
					mysql_query($insertpost) or die("Could not insert post"); //insert post
					$updatepost="UPDATE `forumtutorial_posts` SET `numreplies`=`numreplies`+'1', `lastposter`='$name', `lastrepliedto`='$thedate' WHERE `postid`='$id'";
					mysql_query($updatepost) or die("Could not update post");
                                  $updatep="UPDATE `users` SET `post_count`=`post_count`+'1' WHERE `Username`='$name'";
					mysql_query($updatep) or die("Could not update post");
					print "Message posted, go back to <A href='index.php?page=message&id=$id&forum=$forum'>Message</a>.";
				$gettopic="SELECT * FROM `forumtutorial_posts` WHERE `postid`='$id'";
				$gettopic2=mysql_query($gettopic) or die("Could not get topic");
                <?php  if($gettopic3['forumlock'] == 0)
     ?> Your message:
                    <br><form action='index.php?page=reply&forum=<? echo $forum; ?>&id=<? echo $_GET['id']; ?>' method='post' name='myform'>
					  <div style='padding-left: 5px; padding-top:5px;'></div>
					  <input name="title" type="hidden" value="<?php echo $gettopic3['title'];?>" />
				      <textarea id="inputforum" class="inputforum" name='yourpost' rows='5' cols='40'><?php if(isset($_POST['quote'])) {
                        $quote= $_POST['quote'];
						   $query = "SELECT * FROM forumtutorial_posts where postid=$quote"; 
if ($result = mysql_query($query)){
    if (mysql_num_rows($result)) {
        $array = mysql_fetch_assoc($result);}
?> quote by:<?php echo $array['author'];?>
echo $array['post']; }}?> [/quote]</textarea>
				      <input type='submit'class="submit-btn" name='submit' value=''>
    echo 'forum is locked';
			?>		</td>
$pagenum = isset($_GET['pagenum']) ? $_GET['pagenum'] : "1";
$gettopic="SELECT * from forumtutorial_posts where postid='$id'";
$gettopic2=mysql_query($gettopic) or die("Could not get topic");
//Here we count the number of results
//Edit $data to be your query
$data = mysql_query("SELECT * from forumtutorial_posts where parentid='$id'") or die(mysql_error());
$rows = mysql_num_rows($data);
//This is the number of results displayed per page
$page_rows = 4;
//This sets the range to display in our query
$max = 'limit ' .($pagenum - 1) * $page_rows .',' .$page_rows;
//This is your query again, the same one... the only difference is we add $max into it

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Frosty555Connect With a Mentor Commented:
Every time the user makes a post, update their user profile (e.g. whatever table you are using to store user information) to store the date/time of the last post.

Next time a user tries to post, first check how long it has been between the current date, and the last post date. If less than a minute or so has elapsed, fail with a validation error telling the user to wait. Only allow posts after a certain amount of time has elapsed.
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