mysql UPDATE not updating the mysql table row - php

Question

This is my first time with UPDATE (mysql) this code isn't send the updates to my mysql database/table/row. I spent hours on php.net , but from what I can see at my current level or php knowledge its right and since I'm wrong, them I' dumb =}.
I turned loggin on mysql - nothing useful
This is from ZEND server: So it appears to be passing, but it is not updating in the mysql database.
Function Name: mysql_query
Function Arguments:
'UPDATE ads SET adcode = \'7000sbjhbjhbhjb\' WHERE ads_ID = 8'
any pointers/help is much appreciated.
<?php
require 'config.php';
// Report all Errors
//error_reporting(-1);
//ini_set('display_errors','On');
//connect to DB
mysql_connect("$host", "$db_user", "$db_password");
mysql_select_db("$db_name");
$query = "SELECT * FROM ads";
$result = mysql_query($query);
$num = mysql_numrows($result);
echo "<h1><center>AD's Currently Available</center></h1><br /><br />";
$i=0;
while ($i < $num) {
$ID = mysql_result($result,$i,"ID");
$adname = mysql_result($result,$i,"adname");
$currentadcode = mysql_result($result,$i,"adcode");
// Delete AD item by ID number
$action = (isset($_REQUEST['action']));
if ($_GET['action'] == "deletead") { // remove AD
mysql_query("DELETE FROM ads where ID = '$_GET[IDnum]'");
$i=$i++;
header("Location: " . $_SERVER['PHP_SELF']);
}
$letknown = "<b>AD removed</b><br />";
**// Edit AD code
if (isset($_POST['editad' . $ID])) {
$newadcode = mysql_real_escape_string($_POST['adcode' . $ID]);
$doedit = "UPDATE ads SET adcode = '" . $newadcode . "' WHERE ads_ID = " . $ID;
$updatead = mysql_query($doedit);
header("Location: " . $_SERVER['PHP_SELF']);**
}
$letknown = "<b>Ad Edited</b><br />";
echo "<b>$ID : $adname</b><br />Delete Ad<br /><br />\n";
echo "Preview :<br /><div class=\"adcode\">$currentadcode</div><br /> \n";
echo "<br />\n";
echo "<form action=\"displayads.php\" name=\"addAD$ID\" method=\"post\">\n";
echo "AD code (can be any type of script) text link, javascript or banner :<br />\n";
echo "Code :<br /><textarea name=\"adcode$ID\" wrap=\"physical\" cols=\"60\" rows=\"5\" onKeyDown=\"textCounter(document.addAD$ID.adcode$ID,document.addAD$ID.remLen$ID,5000)\" onKeyUp=\"textCounter(document.addAD$ID.adcode$ID,document.addAD$ID.remLen$ID,5000)\">$currentadcode</textarea>";
echo "<br /><input readonly type=\"text\" name=\"remLen$ID\" size=\"3\" maxlength=\"3\" value=\"5000\">Characters Left \n";
echo "**<input type=\"submit\" name=\"editad$ID\" value=\"Edit AD Code\">**</form>\n";
echo "<br /><hr />";
$i++;
}
?>

Answer 1

You are missing closing double quotes :
$doedit = "UPDATE ads SET adcode = '" . $newadcode . "' WHERE ads_ID = '". $ID."'";
Or simply write your query like this :
$doedit = "UPDATE ads SET adcode = '$newadcode' WHERE ads_ID = '$ID'";
Use LIMIT 1 if you want to update only a single row