Split command problem

[Russ <russbucket@xxxxxxxxxxxxxx>]

I have been trying to get the following code working. I keep getting an error 
on line nine. It looks simular to the example in the PHP online manual. If I 
substitute a print command for line nine I get the correct information from 
$_POST[username]. I must be missing or have an extra a quote but I cannot 
figure out where.

<?php
//check for required fields from the form
if ((!$_POST[username]) || (!$_POST[password])) {
	header("Location: memberlogin15.7.php");
	exit;
} 
if(preg_match("/[A-Z]/", substr("$_POST[username]", 0, 1)))
{
name($fname, $lname) = split('[/\s+/]', "$_POST[username]");
//echo "First Name: $fname; Last Name: $lname\n;
echo "first letter is uppercase";
}
else
{
echo "first letter is not uppercase";
}

Any help will be appreciated.
-- 
Russ

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