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Why this code doesn't update my table with the values in link field

Last Modified: 2013-12-13
I have this code and its not updating the values ..can someone please help


$result = mysql_list_tables($DB);
if (!$result) {
    echo "DB Error, could not list tables\n";
    echo 'MySQL Error: ' . mysql_error();
while ($row = mysql_fetch_row($result)) {
        if((substr($row[0],0,16) == "table_customer_83452"))
     $id = substr($row[0],-5);
       echo $id."<BR>";
       $qu = "Select token from ".$row[0];
       echo $qu."<BR>";
       $tableresult = mysql_query($qu);
       while($tablerow = mysql_fetch_array($tableresult)){

       $link = "http://mywebsite.com/sweetwater1/index.php?sid=".urlencode($id)."&token=".urlencode($tablerow[0])."&lang=en";
     $query = "UPDATE ".$row[0]." SET linkadd = '$link' WHERE token = $tablerow[0]";
            //$query = "UPDATE " . $row[0] . " SET firsname='$firstname',lastname='$lastname',number='$number'";
           // $resultUpdate = mysql_query($query);
           // if(!$resultUpdate)
             //   die(mysql_error());
     echo mysql_error();

It just gives me a blank page.
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