PHP 邮箱正则表达式代码如下：

/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,})$/

实例

<?php $mail = 'runcodex@runcodex.com'; //邮箱地址 $pattern = "/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,})$/"; preg_match($pattern, $mail, $matches); var_dump($matches); //输出匹配结果 ?>

以上代码运行输出结果为：

array(4) {
  [0]=>
  string(17) "runcodex@runcodex.com"
  [1]=>
  string(0) ""
  [2]=>
  string(0) ""
  [3]=>
  string(4) ".com"
}

使用 FILTER_VALIDATE_EMAIL 过滤器

实例

<?php $email = 'runcodex@runcodex.com'; //邮箱地址 if (filter_var($email, FILTER_VALIDATE_EMAIL)) { $emailMsg = "正确邮箱格式"; } else { $emailMsg = "非法邮箱格式"; } echo $emailMsg;