PHP page with MySQL not showing/working - php

Question

The following code is not working as the page displays nothing, and I am not exactly sure why. It gets a few things from the URL and then the final Album name from the database. Here is the code:
<?php
$cart1 = rawurldecode($_GET["path"]);
list( , , , , , $cart2) = explode ("\\", $cart1);
$cart3 = $cart2;
list($cart4) = explode (" ", $cart3);
$con = mysql_connect("SERVER","USER","PASS");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("cartmatch", $con);
$result = mysql_query("SELECT * FROM cartmatch WHERE CARTNO='$cart4'");
while($row = mysql_fetch_array($result))
{
echo '<form enctype="multipart/form-data" action="albumgo.php" method="POST"><input name="ID" type="hidden" value=';
echo $_GET["ID"];
echo ' ><input name="enabled" type="hidden" value=';
echo $_GET["enabled"];
echo ' ><input name="artist" type="hidden" value=';
echo $_GET["artist"];
echo ' ><input name="title" type="hidden" value="';
echo $_GET["title"];
echo '" >Name:<br/><input name="album" type="text" autofocus="autofocus" value="';
echo $row['ALBUM'];
echo '" ><input type="submit" name="edit" value="Save"></form>';
}
mysql_close($con);
?>

Answer 1

Try to put the following code to see if there is an error in your script.
ini_set('display_errors', 1);
ini_set('log_errors', 1);
ini_set('error_log', dirname(__FILE__) . '/error_log.txt');
error_reporting(E_ALL);
Probably there is a database connection error or something preventing PHP from displaying the rest of the content.

Answer 2

list($cart4) = explode (" ", $cart3);
Should have been
list($cart4) = explode ("+", $cart3);