PHP - Mysql Real Escape Sting Help + Text Area Line Break Help???

Hello I am having a problem trying to write to a database using mysql real escape so there wont be any injection attacks. I trying using myrealescape and it returns errors:
Code: [Select]
Notice: Use of undefined constant messageTo - assumed 'messageTo' in D:\wamp\www\Legit Gaming Upload\LGU\includes\mailCompose.php on line 17

Notice: Use of undefined constant messageSubject - assumed 'messageSubject' in D:\wamp\www\Legit Gaming Upload\LGU\includes\mailCompose.php on line 17

Notice: Use of undefined constant messageBody - assumed 'messageBody' in D:\wamp\www\Legit Gaming Upload\LGU\includes\mailCompose.php on line 17
I add in the single quotes and it doesn't write either. Dreamweaver says that either single quotes or not there is no syntax errors.

What going on? I have used it like this befo ('$ID','" . mysql_real_escape_string($_POST[post_content]) . "') and no problems..

~AJ


<?php 
require_once('connect.php');

if(isset($_COOKIE['user'])){}else{
header( 'Location: members.php');
}

if (isset($_POST['sendBtn'])){

$messageFrom = $_COOKIE['user'];
$messageTo = $_POST['messageTo'];
$hash = $messageTo.$messageFrom.time();
$hash = md5($hash);

mysql_select_db("majik");

$sql="INSERT INTO messagesystem(ID, hash, messageTo, messageFrom, messageSubject, messageBody, messageDate, messageRead, messageDelete) VALUES ('','$hash','" . mysql_real_escape_string($_POST['messageTo']) . "','$messageFrom','" . mysql_real_escape_string($_POST['messageSubject']) . "','" . mysql_real_escape_string($_POST['messageBody']) . "','0','0')";

echo '<center>Your message was sent to: '.$messageTo.'</center>';


}


?>

I have never used real escape string so want to make sure I did it correctly. Also, if I can place it anywhere else to make it even more secure please let me know. This is just the action of a just a simple POST html form.

Here it is.
Code: [Select]
<?php
require ('staffarea/sql.php');
$showform="false";

$mcid = mysql_real_escape_string($_POST['mcid']);       
$age = mysql_real_escape_string($_POST['age']);
$description = mysql_real_escape_string($_POST['description']);

if(!mysql_query("INSERT INTO `somedatabase`.`appsubmissions` (`id`, `username`, `age`, `description`, `status`) VALUES (NULL, '$mcid', '$age', '$description', 'Pending');"))
{
echo '<div class=blockrow><b><font size=4>Submission Error</font><br /><br />Something went wrong. Contact Staff in the Support Forums and give them this information:<br /><br /></b><font color=red>';

echo mysql_error();

echo "</font>";

echo '<br /><br /><a href="/forumdisplay.php?f=14">Support Forums</a></div>';
}
else
{

$lastID=mysql_insert_id();

echo "<div class=blockrow><font size=3><b>$mcid, Thank You for your Building Application!</b></font><br /><br />";

echo "Your Unique Application ID: <b>", $lastID;

echo "</b> (save this so you can check the application status later)<br /><br />

Your application was submitted successfully. Please allow Staff 24 hours to accept or deny your application. If after 48 hours you still do not have building rights, assume the application was denied and re-submit with different information. DO NOT submit an application more than every 48 hours, doing so will get your account banned for spamming.<br /><br />

While waiting, you might check out the <a href=/index.php?pageid=mcguide>Ultimate Guide</a>.</div>";
}

mysql_close($con);

?>

i have made function of prepare or check the mysql real escapte string but when i run this code it gives two warnings msg
Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: Access denied for user 'SYSTEM'@'localhost' (using password: NO) in C:\wamp\www\cart\include\db.php on line 42

Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in C:\wamp\www\cart\include\db.php on line 42
 kindly tell me what is this msg about how to solve it my code is
37 public function mysql_prep($value){
38 $magic_quotes_active=get_magic_quotes_gpc();
39v$new_enough_php=function_exists("mysql_real_escape_string");
40 if($new_enough_php){
   41if($magic_quotes_active){ $value=stripslashes($value);}
   42 $value= mysql_real_escape_string($value);}
   43 else {
   44   if($magic_quotes_active){$value=addslashes($value);}
      
   45}
   46   return $value;
      
48 }

on the first column do I need to escape that? "pm_id"
if so how do i do that with the right syntax
is it like this?
pm_id = '.mysql_real_escape_string.'


Code: [Select]
<?php $mail2 = "INSERT INTO pm SET pm_id = '', sendto = '".mysql_real_escape_string($to)."', sentfrom = '".mysql_real_escape_string($from)."' ?>
Also when you create a new row with a id  having auto increment. do i have to do id ="" so there isnt ever two rows matching the same id?

'[$username]' is using a variable from a cookie varifying that you are logged in, this code works except i need to put real escape strings and protection from mysql injection and dont really know where to put them.

Code: [Select]
if (isset($_POST['submit'])) {

        // now we insert it into the database
$insert = "INSERT INTO gamecomments (username, comment)
VALUES ('[$username]', '$_POST[comment]')";

$add_comment = mysql_query($insert);
{
 echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"1; URL=games.php\">";
  }
 }
[CODE]