php 内置正则配置邮箱 使用 FILTER_VALIDATE_EMAIL 过滤器 <?php $email = 'runoob@runoob.com'; //邮箱地址 if (filter_var($email, FILTER_VALIDATE_EMAIL)) { $emailMsg = "正确邮箱格式"; } else { $emailMsg = "非法邮箱格式"; } echo $emailMsg;