PHP 替换标签和标签内的内容

$filter_arr=array('/#(.*?)#/','/\$(.*?)\$/','/\^(.*?)\^/');//要替换的标签

$content=$data['Monthlys']['content'];//替换的内容
$replace=array('a','b','c');//这里替换的内容数量要跟替换的标签一致

preg_replace($filter_arr, $replace, $content);