// BBCode function	
function bbcode_format ($str) {
    // Strip HTML tags
	$str = htmlentities($str);

	// Find BBCode
	$simple_search = array(
	'/\[b\](.*?)\[\/b\]/is',                               
	'/\[i\](.*?)\[\/i\]/is',                               
	'/\[u\](.*?)\[\/u\]/is',
	'/\[s\](.*?)\[\/s\]/is',
	'/\[img\](.*?)\[\/img\]/is',
	'/\[quote=(.*?)\](.*?)\[\/quote\]/is',
	'/\[quote\](.*?)\[\/quote\]/is',
	'/\[url=(.*?)\](.*?)\[\/url\]/is',
	'/\[url\](.*?)\[\/url\]/is',
	'/\[break\](.*?)\[\/break\]/is',
	'/\[youtube\](.*?)\[\/youtube\]/is');

	// Translate BBCode to XHTML
	$simple_replace = array(
	'<strong>$1</strong>',
	'<em>$1</em>',
	'<span style="text-decoration: underline;">$1</span>',
	'<del>$1</del>',
	'<img src=\"$1\" alt=\"\" />',
	'$1 said: \"$2\"',
	'"$1"',
	'<a href=\"$1\">$2</a>',
	'<a href=\"$1\">$1</a>',
	'<br />',
	'<object type=\"application/x-shockwave-flash\" width=\"425\" height=\"350\" data=\"$1\"><param name=\"movie\" value=\"$1\"/></object>');

    // Output HTML translations
    $str = preg_replace ($simple_search, $simple_replace, $str);
    return $str;
}