retrieve data from database

[kidphantom]

i want to retrieve data only from a single person after he/she login into the system..here is the code for the retrieving page:

<title>RETRIEVING</title>
<?php
// Connects to your Database
$host="127.0.0.1"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="OFCCC"; // Database name
$tbl_name="register"; // Table name


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


$data = mysql_query("SELECT * FROM register WHERE u_name= 'username'")
or die(mysql_error());
Print "<center><table border cellpadding=5>";
while($info = mysql_fetch_array( $data ))
{
Print "<tr>";
Print "<th>Full Name:</th> <td>".$info['f_Name'] ." " .$info['l_Name']."</td> ";
Print "<th>IC Number:</th> <td>".$info['ic_Num'] . " </td></tr>";
Print "<th>Car Plat Number:</th> <td>".$info['plat'] . "</td> ";
Print "<th>Car Type:</th> <td>".$info['type'] . " </td></tr>";
Print "<th>Car CC:</th> <td>".$info['cc'] . " </td></tr>";
Print "<th>Car Transmission:</th> <td>".$info['trans'] . " </td></tr>";
}
Print "</table>";
?>

-->u_name : my title of the all of the username in the database
-->username : the name of textbox in mt login page

my prob here is what must i call from the registration page(the BOLD) so that the data that will come out only from the person who login to the system..tq

[MarPlo]

If username is the name of textbox in mt login page, try

// ...
$username = $_POST['username'];
$data = mysql_query("SELECT * FROM register WHERE u_name='$username'")
or die(mysql_error()); 
// ... 

[kidphantom]

hye..i dont know what is wrong,but it still get to error
lets say i have this in my login.php form:
<input name="login" type="text" class="textfield" id="login" />
<input name="password" type="password" class="textfield" id="password"/>

and this is in my register.php form:
<form name="register" action="registerExec.php" method="post" >
Username <input name="uname" type="text" />
Password<input name="pswd1" type="password" /> <input type="submit" value="Register"/>
</form>
and also to insert the data from this page:
$sql="INSERT INTO register (u_name, p_swd)
VALUES('$_POST[uname]','$_POST[pswd1]')";

now, i am success to register and login to the system. so, i think for the retrieve code, i will be like this rite:
<?php
// Connects to your Database
$host="127.0.0.1"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="retrieve"; // Database name
$tbl_name="register"; // Table name


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

$user = $_POST['login'];
$data = mysql_query("SELECT * FROM register WHERE u_name='user'")
or die(mysql_error());

while($info = mysql_fetch_array( $data ))
{
Print "<tr>";
Print "<th>WELCOME:</th> <td>".$info['u_name'] ." </td></tr>";
Print "<th>YOUR PASSWORD:</th> <td>".$info['p_swd'] ." </td></tr>";
}

?>

TQ =)

[MarPlo]

The variable $user must have the $ sign in the sql query too:

$data = mysql_query("SELECT * FROM register WHERE u_name='$user'")