str_replace using an array

[TheServant]

I am just finishing off a really basic chat system and I am having problems with a function I have made:

function smiley($text) {
    $smilies = array(
	    ':)' => "<img src='emotions/happy.gif' />",
	    ':D' => "<img src='emotions/vhappy.gif' />",
	    ':(' => "<img src='emotions/sad.gif' />",
	    ';)' => "<img src='emotions/winking.gif' />",
	    '>)' => "<img src='emotions/evil.gif' />",
	    '>(' => "<img src='emotions/mad.gif' />",
    );
    $text = str_replace( array_keys($smilies), array_values($smilies), $text );
    return $text;
}

It simply does not work. There is no change to the $test value. Does anyone know why?

[TheServant]

Sorry for the post. Figured it out. That bit does work, it was another problem but fixed that and it works. Apologies again.