/s','${4}',$this->content);
//短代码（无参数）
$reg = '/\[scode\](.*?)\[\/scode\]/s';
$rp = '${1}
';
$content = preg_replace($reg,$rp,$content);
//短代码（有参数）
$reg = '/\[scode.*?type="(.*?)"\](.*?)\[\/scode\]/s';
$rp = '${2}
';
$content = preg_replace($reg,$rp,$content);
//font文字排版
//无参数时，自动解析为红色
$reg = '/\[font\](.*?)\[\/font\]/s';
$rg = '${1}';
$content = preg_replace($reg,$rp,$content);
//解析只有color参数的font
$reg = '/\[font color="(.*?)"\](.*?)\[\/font\]/s';
$rp = '${2}';
$content = preg_replace($reg,$rp,$content);
//解析只有bg参数的font
$reg = '/\[font bg="(.*?)"\](.*?)\[\/font\]/s';
$rp = '${2}';
$content = preg_replace($reg,$rp,$content);
//解析只有size参数的font
$reg = '/\[font size="(.*?)"\](.*?)\[\/font\]/s';
$rp = '${2}';
$content = preg_replace($reg,$rp,$content);
//解析只有style参数的font
$reg = '/\[font style="(.*?)"\](.*?)\[\/font\]/s';
$rp = '${2}';
$content = preg_replace($reg,$rp,$content);
//滚动文本区域
$reg = '/\[stext\](.*?)\[\/stext\]/s';
$rp = '${1}
';
$content = preg_replace($reg,$rp,$content);
echo $content
?>