更新SQL表

I want to update a table on a specific row need some advice on my php statement

I use this statement to call the client's info

<?php
$host="localhost"; // Host name 
$username="****"; // Mysql username 
$password="****"; // Mysql password 
$db_name="****"; // Database name 
$tbl_name="members"; // Table name

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// get value of id that sent from address bar
$id=$_GET['id'];

// Retrieve data from database 
$sql="SELECT * FROM $tbl_name WHERE member_msisdn='$query'";
$result=mysql_query($sql);
$rows=mysql_fetch_array($result);
?>

This works fine echoíng the information I need and able to alter it.

<form name="form1" method="post" action="control_clientupdated.php">

This referes to my action php script

Problem I need assistance with is how do i notify my action script to use the same id I ran the query on to update that row.

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// update data in mysql database 
$sql="UPDATE $tbl_name SET member_name='$member_name',     
member_surname='$member_surname', member_msisdn='$member_msisdn', cid='$cid',    
cofficenr='$cofficenr', cfax='$cfax',  e2mobile='$e2mobile' WHERE member_msisdn='$query'";
$result=mysql_query($sql);

I have placed the WHERE statement on the end of the update

Let me just state it shows done, but it did not update the table at all

Firstly you need to store your ID into a hidden form element in your form.

<form method="post" action="control_clientupdated.php">
    <input type="hidden" name="member_msisdn" value="<?=$query?>" />
    ...
</form>

This will allow you to passthrough the value from your first php script.

Then in your control_clientupdated.php you need to use $_POST to recover your value.

// Store the $_POST value for my query ID
$query = $_POST['member_msisdn'] ;

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// update data in mysql database 
$sql="UPDATE $tbl_name SET member_name='$member_name',     
member_surname='$member_surname', member_msisdn='$member_msisdn', cid='$cid',    
cofficenr='$cofficenr', cfax='$cfax',  e2mobile='$e2mobile' WHERE member_msisdn='$query'";
$result=mysql_query($sql);

This should be what you need - note that you cannot use $_GET to retrieve the variable passed by the form, as you are sending it with the method="post" attribute, you must use $_POST instead of $_GET