Update SQL tables - php

Question

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

Answer 1

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