不推荐Eregi函数

Question

下面是我的代码(来自submit.php)，它引发了一个错误：

$email_from = $_POST['email']; // required
$error_message = "";
$email_exp = "^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$";
if(!eregi($email_exp,$email_from)) {
$error_message .= 'The Email Address you entered does not appear to be valid.<br />';
}

我知道我需要使用preg_match，但我不知道如何实现它。我看过文件，但还是不明白。谢谢!

Answer 1

$email_exp = "/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i";
 if(preg_match($email_exp,$email_from) != 1) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
}

实际上，它非常简单，非常类似于eregi.

Answer 2

移除这个

  $email_exp = "^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$";
  eregi($email_exp,$email_from) 

并使用

$email_exp = "/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i";
preg_match($email_exp, $email_from)