if statement not working

[bob2006]

now i am trying to get this to work it should change the variable if the statement is ture and it not in that and any one help

include'db.php';
$sql2=mysql_query("SELECT * FROM site_config WHERE id=1")or die(mysql_error());

while($row2=mysql_fetch_array($sql2))
{
$paypal_email=$row2['paypal_email'];
$price=$row2['price'];
$sandbox=$row2['sandbox'];
$account_number=$row2['account_number'];
$quantity_1=$row2['quantity_1'];
$product=$row2['product'];
$return_url=$row2['return_url'];
$demo=$row2['demo'];
if($sandbox==1)
{
$link='http://www.sambob.info';
if(empty($sandbox))
{

$link='http://www.bob.tdsnet.org';


}
echo"$link<br>$sandbox";
}

}

[Pikachu2000]

Misplaced curly braces? Currently, your check to see if $sandbox is empty is inside the if($sandbox ==  1) { conditional. Obviously, if $sandbox == 1, it can never be empty.

[bob2006]

the 1 come form a checkbox when i uncheck it the databases has noting in it

[Pikachu2000]

Then if $sandbox doesn't have a value of 1, the conditional that checks if $sandbox is empty is never reached, leaving $link most likely undefined. Indent your code properly and it should be fairly obvious what's happening with it.