Display user selection in dropdown list - php

Question

After the user select the CD, I'm trying to display a user's selection with editing so I'm displaying it in either textbox or dropdown list. As in the picture I can get Publisher to display in a textbox but for the dropdownlist it's showing as blank. I have try to $CDPub within the option value but it doesn't work.
<form method="get" action="UpdateCD.php">
<div align="center">
<div>Title <input type = "text" name = "CDTitle" value = "<?php echo $CDTitle; ?>" /></div></br>
<div>Year <input type = "text" name = "CDYear" value = "<?php echo $CDYear; ?>" /></div></br>
<div>Price <input type = "text" name = "CDPrice" value = "<?php echo $CDPrice; ?>" /></div></br>
<div>Category <input type = "text" name = "CDCat" value = "<?php echo $CDCat; ?>" /></div></br>
<div>Publisher <input type = "text" name = "CDPub" value = "<?php echo $CDPub; ?>" /></div></br>
Publisher
<select name="CDPub">
<option value= " ">
<?php
include 'database_conn.php'; //make db connection
if (! ( is_object($conn ) && ( get_class( $conn ) == 'mysqli' ))) {
die("DB connection failure.");
}
$rsCDpub = mysqli_query($conn, "SELECT nmc_publisher.pubName FROM nmc_publisher");
if ( !$rsCDpub ) {
die("No result from DB query."); //probably invalid SQL, table error
}
if ( $rsCDpub->num_rows < 1 ) {
die("No rows returned from DB query."); //query runs but nothing is found in DB to match
}
while($Catpubresult = mysqli_fetch_array($rsCDpub)){
echo "<option value='".$Catpubresult[0]."'>".$Catpubresult[0]."</option>";
//echo "<option value='".$Catpubresult[0]."'>".$Catpubresult[0]."</option>";
}
?></br></br>
<div><input type="submit" value="Update"></div>
</form>

Answer 1

You can do something like this:
// your code
while($Catpubresult = mysqli_fetch_array($rsCDpub)){
$option = "<option value='{$Catpubresult[0]}'";
if($Catpubresult[0] == $CDPub){
$option .= " selected='selected'";
}
$option .= ">{$Catpubresult[0]}</option>";
echo $option;
//echo "<option value='".$Catpubresult[0]."'>".$Catpubresult[0]."</option>";
}
// your code