Få smileys ind i mit forum

$smiley_codes = array(':)', ';)', ':(');
$smileys_images = array('<img src="images/smile.gif" alt="smiley">', '<img src="images/wink.gif" alt="smiley">', '<img src="images/sad.gif" alt="smiley">');
echo str_replace($smiley_codes, $smileys_images, $streng_fra_db);

$arr_repl_smiles = array(
    ':)' => '<img src="images/smile.gif" alt="smiley">',
    ';)' => '<img src="images/wink.gif" alt="smiley">',
    ':(' => '<img src="images/sad.gif" alt="smiley">'
);

echo strtr($streng_fra_db, $arr_repl_smiles);