Arrays 101: What's Going On Here??

This:

<?php
//--> Function
function createUniqueValues( $iNumberOfUnique = 5 )
{
    if($iNumberOfUnique > 260)
    {
        trigger_error('The number of unique entries cannot be more than 260',E_USER_ERROR);
        return;
    }
    $aAlpha        = range('A','Z');
    $aValues    = array();
    while( count($aValues) <= $iNumberOfUnique )
    {
        $sCurrentValue = $aAlpha[rand(0,25)] . rand(0,9);
        if( ! in_array($sCurrentValue,$aValues) )
        {
            $aValues[] = $sCurrentValue;
        }
    }
    return $aValues;
}

//--> Usage
echo '<pre>';
print_r(createUniqueValues(259));
echo '</pre>';
?>

PHP:

The above generates 260 unique "variables" with one letter and one number.
Now I want to use just two as a variable. I've tried:

<br /><br />
<?php
echo "<br />Two values are " 
. $aValues[2] . " & " . $aValues[3];
echo "Help!!!!!!!" ;
?>

PHP:

<br /><br />
<?php
echo "<br />Two values are " 
. $sCurrentValue[2] . " & " . $sCurrentValue[3];
echo "Help!!!!!!!" ;
?>

PHP:

Nothing works...

How do I select and use just two of these as variables?

Thank you

 

This works

$sCurrent = createUniqueValues(259);
echo "<br />Two values are "
. $sCurrent[2] . " & " . $sCurrent[3];

 

Green Rep given for quick response, thanks.

```

This worked better
(from Sitepoint)

Thanks