保护联系表单脚本

Question

你好!我只是想知道我刚刚创建的这个contactform脚本有多安全？很久以前,当我制作我的联系表时,我的老师正在唠叨我.

if($_SERVER['REQUEST_METHOD'] === 'POST'){

    $myemail  =    "email@adress.com";
    $name      =    $_POST['name'];
    $email    =    $_POST['email'];
    $phone    =    $_POST['phone'];
    $subject  =    $_POST['subject'];
    $comments =    $_POST['comments'];

   if($name == 0 || !preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/", $email) || !preg_match("/^\d{2}(-\d{3}){2}(\d{2})?$/", $phone) || $subject == 0 || $comments == 0){

       $error_message = 'Something was written wrong..';

   } else {

       $message = "Hello!
       Your contact form has been submitted by:
       Name: $name
       E-mail: $email
       Phone: $phone
       Comments: $comments
       End of message";
       mail($myemail, $subject, $message);
       $error_message = 'Your message was sent!';

    }
}

有关如何使其安全的任何建议？

PS 保护联系表格和保护php联系表格都适用于WordPress,而这不是我的目的.

Answer 1

您可以使用函数来验证条目,例如:

function check_input($data)
 {
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    return $data;
 }

和

   

        $name      =    check_input($_POST['name']);
        $email    =    check_input($_POST['email']);
        $phone    =    check_input($_POST['phone']);
        $subject  =    check_input($_POST['subject']);
        $comments =    check_input($_POST['comments']);

和

     if ($name && $email && $phone && $subject && $comments) {
         Send contact form...

}

当然,您可以添加验证码以使其更安全.