正则匹配<{$vcode}>变量

$title="<{t}>您的验证码是：<{/t}><{$vcode}>，<{t}>请在注册页输入验证码并完成注册；验证码<{$vcode2}>有效期24小时<{/t}>";

if($data!=""){
preg_match_all('/<\{\$(\S+)\}>/iU', $title, $result);

foreach($result[1] as $k => $v){
$v=explode('.',$v);
$data=$tmpArr;

foreach($v as $key => $val){

$data=$data[$val];

if(is_array($data))
continue ;
else{

$title = str_replace($result[0][$k],$data,$title);

}

}
}

}