i have a form to send to table. there is two drop down list. first has information about job of current user that logged in and second one fetch all usernames of users. a field for date a field for price and a field for comment. so my code is here:
this code get all information. submit.action.php
 <form name="form5" method="post" action="send_action.php" >
<div dir="rtl">         
                <?php
   $db_host = 'localhost';
   $db_name= 'site';
   $db_table= 'job_list';
   $db_user = 'root';
   $db_pass = '';
  $user=$fgmembersite->UserNameOfUser();
  $con = mysql_connect($db_host,$db_user,$db_pass) or die("خطا در اتصال به پايگاه داده");
  $selected=mysql_select_db($db_name, $con) or die("خطا در انتخاب پايگاه داده");
 mysql_query("SET CHARACTER SET  utf8");
 $dbresult=mysql_query("SELECT job_list.job_id,
                               job_list.job_name,
                       tablesite.username
                   FROM  $db_table
          INNER JOIN relation
          on job_list.job_id=relation.job_id
          INNER JOIN tablesite
          on relation.user_id=tablesite.id_user AND tablesite.username='$user'",$con);
 echo'* خدمتی که ارائه داده اید: ','<br/>';                    
 echo '<select name="job" dir="rtl">';
 while($amch=mysql_fetch_assoc($dbresult))
 {
 echo '<option value="'.$amch['job_id'].'">'.$amch['job_name'].'</option>';
 }
 echo '</select>'; ?><br/>
 </div>     
 <!--************************************************************** --> 
 <div dir="rtl">    
 <?php  
 $db_host = 'localhost';
 $db_name= 'site';
 $db_table2= 'tablesite';
 $db_user = 'root';
 $db_pass = '';
 $con2 = mysql_connect($db_host,$db_user,$db_pass) or die("خطا در اتصال به پايگاه داده");
 $selected=mysql_select_db($db_name, $con2) or die("خطا در انتخاب پايگاه داده");
 mysql_query("SET CHARACTER SET  utf8");
 $dbresult=mysql_query("SELECT *
                              FROM  $db_table2",$con2);
 echo'* نام کاربری که به او خدمت داده اید: ','<br/>';                      
     echo '<select name="users" dir="rtl">';
     while($amch=mysql_fetch_assoc($dbresult))
      {
   echo '<option value="'.$amch['id_user'].'">'.$amch['username'].'</option>';
      }
   echo '</select>'; ?><br/>
   <label for='date' >* تاریخ عملیات:</label><br/>
   <input type='text' name='date' id='date' value='' maxlength="11" placeholder="1394/1/1" /><br/>
   <label for='price' >* هزینه کار:</label><br/>
   <input type='text'  dir="rtl" name='price' id='price' value='' maxlength="50" placeholder="54000"/><br/>
   <label for='textaria' >توضیحات:</label><br/>
   <textarea name="textaria" cols="" rows=""></textarea><br/>
   <input name="submit" type="submit" value="ثبت عملیات" />
   </div>
    </form>
  </span>
  </div>
and in this page we send information to database but nothing sends!:
 <?php
 require_once("./include/membersite_config.php");
 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <title>ارسال عملیات</title>
 </head>
 <body>
 <?php
 $id=$fgmembersite->UserID(); 
 echo "$id"; ?>
 <?php
 $db_host = 'localhost';
 $db_name= 'site';
 $db_table= 'action';
 $db_user = 'root';
 $db_pass = '';
 $con = mysql_connect($db_host,$db_user,$db_pass) or die("خطا در اتصال به پايگاه داده");
 mysql_query("SET NAMES 'utf8'", $con);
 mysql_query("SET CHARACTER SET 'utf8'", $con);
 mysql_query("SET character_set_connection = 'utf8'", $con);
 $selected=mysql_select_db($db_name, $con) or die("خطا در انتخاب پايگاه داده");
 $ins = "INSERT INTO $db_table
     (service_provider_id,customer_id,date,price,job_id,service_provider_comment)
     VALUES ('$id',
             '" . mysql_escape_string($_POST['users']) . "',
             '" . mysql_escape_string($_POST['date']) . "',
             '" . mysql_escape_string($_POST['price']) . "',
             '" . mysql_escape_string($_POST['job']) . "',
             '" . mysql_escape_string($_POST['textaria']) . "')";
$saved=mysql_query($ins );
mysql_close($con); 
?>
</body>
</html>
note: above code give all value of dropdown list and text boxes and textarea and should send them to databasetable.
note: fg_membersite included by:
      function UserID()
    {
          return isset($_SESSION['user_id'])?$_SESSION['user_id']:'';
    }
my table is as this:
    job_id                   int(11)
    service_provider_id      int(10)
    customer_id              int(10)
    date                     int(50)
    price                    int(255)
    vote                     varchar(255)
    service_provider_comment varchar(255)
    customer_comment         varchar(255)
 
     
    