PHP 邮箱正则表达式

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1

<?php

$mail = 'runoob@runoob.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) "runoob@runoob.com"
  [1]=>
  string(0) ""
  [2]=>
  string(0) ""
  [3]=>
  string(4) ".com"
}

使用 FILTER_VALIDATE_EMAIL 过滤器

实例2

<?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;