Mysql_query in a variable not working

Error message--

Parse error: syntax error, unexpected T_VARIABLE in /membri/exampletesting/Testing/login.php on line 12

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I dont know why this isnt working. The error says unexpected T_VAR on line 12 but I cant figure out the problem.


Code--

<?php

$username = $_POST['username'];
$password = $_POST['password'];

if ($username&&$password)
{

$connect = mysql_connect("localhost","root","") or die("Couldnt Connect");
mysql_select_db("my_exampletesting") or die("Couldnt Find DB");

$query = mysql_query("SELECT * FROM users WHERE username="$username"");------- Line 12

$numrows = mysql_num_rows($query);

if ($numrows!=0)
{

}
else {
die("That user doesn't exist!");
}
}
else {
die("Please enter a username and a password");
}

?>

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