<?php
function AddBB($var) {
        $search = array(
                '/[b](.*?)[/b]/is',
                '/[i](.*?)[/i]/is',
                '/[u](.*?)[/u]/is',
                '/[img](.*?)[/img]/is',
                '/[url](.*?)[/url]/is',
                '/[url=(.*?)](.*?)[/url]/is'
                );

        $replace = array(
                '<strong>$1</strong>',
                '<em>$1</em>',
                '<u>$1</u>',
                '<img src="$1" />',
                '<a href="$1">$1</a>',
                '<a href="$1">$2</a>'
                );

        $var = preg_replace ($search, $replace, $var);
        return $var;
}
?>