// 定义模板字符串
$template = "您好！你查询的防伪码:code是正品";

// 替换变量
$message = str_replace(':code', $res->code, $template);

echo $message; // 输出: 您好！你查询的防伪码123456是正品

               // 定义模板字符串
 $zh_template = $b->zh_resultSuccessMessage?$b->zh_resultSuccessMessage:'';
 $en_template = $b->en_resultSuccessMessage?$b->zh_resultSuccessMessage:'';

// 替换变量
$zh_message = str_replace('{code}', $check->code, $zh_template);
$en_message = str_replace('{code}', $check->code, $en_template);