Im not sure why Im getting this php error?

[dragazarth]

Ive got some code that goes like this:

echo "
<form action=\"existing_user.php\",>
<fieldset>
<legend>Edit What You Have Here!</legend>
Who are you? <select name=\"user\" />";


$con = mysql_connect("localhost","tf2");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}

mysql_select_db("items", $con);

$result = mysql_query("SELECT * FROM things");

while($row = mysql_fetch_array($result))
{
echo "<option value = \"$row['idthing']\">$row['idthing']</option>"
}

echo "</select>
</br>
<input type=\"submit\" value=\"Submit\" />
</fieldset>";

It is meant to grab a column of names in a mysql database in a column called idthings and then give a dropdown (select) form with each choice a different option.

Im new to php and html and SQL so im not sure what im doing wrong...

I get this error:
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in C:\xampp\htdocs\tf2\index.php on line 50

LINE 50 correspondes to this line echo "<option value = \"$row['idthing']\">$row['idthing']</option>"

THanks
echo "<option value = \"$row['idthing']\">
$row['idthing']</option>"