Help Needed with IF statement

[dr_overload]

I have the following script

<?php
mysql_connect("", "", "") or die(mysql_error());
mysql_select_db("") or die(mysql_error());
$sql = mysql_query("SELECT * FROM world_cup WHERE username ='$username'")
or die(mysql_error());
while($info = mysql_fetch_array( $data ))
if ( $a == $b ) {
echo "$c";
} else {
echo "$d";
}
?>

What I am trying to do is, if the values of fields a&b are the same display the value of field c, if a&b are not the same display the value of field d.

I am not getting any error messages when the page loads in my browser, but it's not displaying any data!

Can anyone help, where have I gone wrong.

Many thanks

[thorpe]

Assuming your fields are actually called a b c and d.

if ( $info['a'] == $info['b'] ) {
  echo $info['c'];
} else {
  echo $info['d'];
}

[dr_overload]

yes, at the moment as i'm testing they are called a,b,c,d

Thanks I'll try that now